Info

General Electric fired over 3000 rounds on the four guns and sufficient data was accumulated to assure that the weapon would be more reliable than the well proven M61. The XM188 guns have been fired at rates of from 300 spm to nearly 2000 spm. The limited amount of ammunition fired was due to a lack of ammunition not to gun problems. All design goals were reached. The design of the 30mm XM188 weapon was undertaken to meet the need for a large-calibre, air-to-ground, close-support weapon...

Us Army Ordnance Corps

The development of the T176 was begun in January 1952. A prototype was made, and after firing about 5,000 rounds, contracts were let for the fabrication of eight additional guns. Three of these included all the improvements and modifications resulting from the firings of the prototype the other five guns were to be made after test firings of the first three had been completed, and were to include all the modifications that the tests indicated to be desirable. Since engineering tests of the...

February

3,562,944 RIFEL WITH DETACHABLE MAGAZINE AND LATCH THEREFOR Karl wagner and Horst Wesp, Steyr, Austria, assignors to Steyr-Daimler-Puch Aktiengesellschaft, Vienna, Austria Filed March 4,1969 Serial No. 804,116 Claims priority, application Austria, April 3,1968,6 Claims (U.S. CL 42-6). 3,562,945 GUN BARREL WITH STEPPED RIFLING Leo David Mikola, Lopentie 10, Riihimaki, Finland Filed Octobcr 14, 1968 Serial No. 767,225 Claims priority, application Finland, October 17, 1967, 5 Claims (U.S. CI....

October

Haglund and Knut G. Knutsson, Eskilstuna, Sweden, assignors to Forenade Fabriksverken, Eskilstuna, Sweden Continuation in part of application Serial Number 672,573 October 3, 1967. This application March 12, 1969 Serial Number 806,373 Claims priority application Sweden, October 4, 1966 4 Claims. (CL 89-1.7). 3,614,908 REMOVABLE UNITARY ACTION FOR A FIREARM Gary Wilhelm, Hamden, Conn. assignor to Stoeger Arms Corporation, South Hackensack Township, Bergen County,...

Ammunition

40mm Ammunition Clip Magazine

The first decision required was whether to adopt an existing round or to produce a completely new one and it was decided that a new APDS round would be needed for the primary role of armour attack. The Royal Armament Research and Development Establishment, which produced the very successful APDS rounds for the 20 pounder, the 105mm and the 120mm tank guns, accepted this task. For the remaining roles, it was decided to use the Hispano-Suiza 831L ammunition, which is well-proven and the high...

June

3,584,532 AUTOMATIC GUN WITH EJECTION ACTUATED RAMMER Eugene M. Stoner, Port Clinton, and George W. Wight, Jr., Oak Harbor, both of Ohio, assicnors to Oberlikon-Buehrle Holding A. G. Zurich-Oerlikon, Zurich, Switzerland, Filed September 16, 1969. Serial Number 858,398 17 Claims. (CI. 89-47). 3,584,533 AUTOLOADING FIREARM OF THE BLOWBACK TYPE Harond D. Allyn, 10 Sumner Ave., Springfield, Mass. Filed January 21, 1969 Serial Number 792,694 5 Claims. (CL 89-144). 3,589,051 CARTRIDGE CHAMBER AND...

Aeronutronic Gun Launcher

In early 1969 Aeronutronic Division of Philco-Ford proposed a weapon concept utilizing counter-recoil operation which would meet Army requirements and offer advantages over similar inventory or development weapons. This concept was directed towrards the 40mm automatic grenade launcher on the basis that a proposed Qualitative Material Requirement was being reviewed for Army calendar year 1975 requirements and because inventory ammunition would be immediately available for the development of the...

General Electric

20mm GAU-4 A XM130 Gas Driven Vulcan The development of the GAU-4 A was done by-General Electric. However, earlier work was done by Armour Research Foundation between 1956 and 1959. The production drawings were issued October 29, 1965 and the first production contract was issued in 1966 and by November 1972, 1102 had been built. The objectives of this program were to design and develop a gas-operated system for the 20mm gun, M61 (formerly T171E3), and the accessories necessary for succcssful...

April

2,978,825 TOGGLE FIRING MECHANISM FOR FIREARMS George H. Tichenor lVr 841 S. Oakland Ave. Pasadena, Calif. Filed Apr. 8,1958 Ser. No. 727,164 12 Claims (CI. 42-69). 2,978,826 TRIGGER SAFETY LATCH FOR FIREARMS JessieT. Ivy, 523 Henderson St. Seattle, Wash. Filed Oct. 28, 1958 Ser. No. 770,196 2 Claims (CI. 42-70). 2,978,827 MEANS FOR ELECTRICALLY FIRING FIRE-ARMS Charles Rouby St. Etienne, France assignor to Soci t Moderne de Fabrications M caniques, St. Etienne, France, a French...

Hm

M85 Major Groups and Components (Exploded View) the high cyclic rate of fire of the T175E1 was from 60 to 100 pcrccnt more than that of the M2, a significant advantage for a weapon that was to be fired at low-flying aircraft. Some disadvantages of the T175E1 were disclosed during the tests. When fired at the low rate, the gun was generally less reliable than when fired at the high rate. The rate-reducing mechanism increased the cost of the weapon. The feeding mechanism of the T175E1 was not as...

The Chain Guns mm EX mm M and mm M

Desert Eagle Handgun

HUGHES TOOL COMPANY (Presently McDonnell Douglas) The Chain Gun in calibre WECOM 30mm fired its first round in April 1973, four months after initiation of the program. In July, the U.S. Army Armament Command sponsored a 2500-round feasibility firing test that was successfully completed with the prototype (A Model) gun on 13 September 1973. During the summer of 1974, the second generation (B Model) Chain Gun underwent tests in accordance with the Hughes program schedule for the Advanced

Ammunition Development

Tile weight and the external shape of the projectile the same within any given family of rounds. This is done so as to obtain as good ballistic matching as possible betwreen the various members of the family. Such a family is called a Ballistically Matchcd Family. By ballistic matching is meant the times of flight are the same and the lines of flight to a predetermined range, usually 1,000 yards, are the same for the various members ot the family. Types of Ammunition used in United States...

Preface

A series of publications entitled The Machine Gun, sponsored by the Bureau of Ordnance, Department of the United States Navy, was prepared with the belief that the next best thing to actual knowledge, is knowing where to find it. The research summarized within the covers of these volumes was compiled in such a manner as to place in the hands of those rightfully interested in the art of automatic weapon design, the world's recorded progress in this field of endeavor. Volume V begins with 1952...

Openchamber Concept

20mm Rifles For Sale

Where it is subjected to very intense gas wash. It is believed that anodizing likewise will make possible the substitution of minimum for steel for the guide tube. b. Decrease in thickness of parts. No attempt has been made to determine minimum section thicknesses. This applies, among other tilings, to the elastomer wall. c. Use of plastic materials. It is believed that ultimately each part in the round can be made of plastic material of one type or another. (Plastic materials as used here...

Mm Me Machine Gun

Continuing since 1967, Marcmont has conducted an in-house program to provide a modified M60 machine gun that would be suitable for service in tank and other enclosed vehicular installations. The M60E2 offers the armed forces an alternate 7.62mm tank machine gun to the M37 or M219 types. The main features of the M60E2 machine gun are a gas exhaust system that collects the spent gas from around the gas cylinder group and directs it forward to the muzzle area and a barrel extension which carries...

December

3,222,808 SHOTGUN FRAME AND 8L0CK ASSEMBLY Walter H. B. Smith, deceased, late of New York, N.Y., by Katherine B. Groves, execitrix, New York, N.Y. Alice Denhoff, substitute executrix of sail Walter H. B. Smith, deceased Original application December 2, 1959 Serial Numher 856,751, now Patent No. 3,077,045, dated February 12,1963 Divided and this application May 11,1962 Serial Number 199,553 2 Claims (CL 42-44). 3,222,809 AUTOMATIC SAFETIES FOR GUNS Harvard J. Bryan, 9303 Sorrento, Dallas, Texas...

Naval Ordnance Station Louisville

Naval Aircraft The 1950

Navy initiated a research program during the early 1950's to investigate the best approach in the field of automatic weapons for aircraft and antiaircraft use. The purpose was to determine the feasibility of combining superior features and well known principles with advancements in ballistics and metallurgy, to produce in a simpler and more reliable automatic weapon than was in use or contemplation. One primary aim was to eliminate gas operation and ram feeding. This program led to the...

Ge

General General Electric Corportion 5, 8-11, 27, 38, 42, 45, 47-50, 53, 57, 59, 66, 67, 69-71, 83-85, 87, 90, 91, 93, 96, 99-101, 105, 109 110, 117, 119, 121-123, 125, 129, 150, 159-161, 172, 177, 181, 193, 211, 234, 245, 281, 329, 365, 371 General Motors Corporation 119, 191, 401 General Impact Extrusion Corporation 470 Goalkeeper Weapon System 7, 11, 154 Gorgas, Major General 3 Machine Gun) 216, 247, 248 GPU-2 A Pod 7, 53 GPU-5 A Pod 7, 11, 159, 160, 161, 163, 167 Green, Dr. S. Y 191 GTAS...

March

Kelly, Jr. Upper Montclair, N.J. assignor, by mesne assignments, to the United States of America as represented by the Secretary of the Navy Filed June 26,1952 Ser. No. 195,635 4 Claims (CI. 89-16). 2,975,678 GUM-LOADING MECHANISMS Sidney J. Finn, Beverly, Mass. assignor to United Shoe Machinery Corporation, Flemington, N.J. a corporation of New Jersey Filed Mar. 20,1946 Ser. No. 655,704 6 Claims (CI. 89-45). 2,975,679 POWER SYSTEM FOR FIREARMS David C....

Frank S Preston-fairfield

3,383,790 PLASTIC BOX MAGAZINE WITH A TOP METALLIC CLAMPING MEMBER Henry A. Into, Wallingford, Conn. assignor to Olin Mathieson Chemical Corporation a corporation of Virginia Filed May 16, 196 Serial Number 638,632 8 Claims. (CL 42 -50). 3,383,984 COMPACT CONSTANT PRESSURE LUBRICATOR FOR THE 20 MM HS 820 GUN SYSTEM Giuliani) O'Andrea, Troy, N.Y. assignor to the United States of America as represented by the Secretary of the Army Filed December 14, 1966 Serial Number 601,813 8 Claims. (CL 89-...

Elton Billingslea

3,503,149 REVOLVER FIRING ACTION MECHANISM Hubert F. Hedges, 85 Richmond Hill, New Canaan, Connecticut 06018, and Richard R. Bergmann, Perry Avenue, Norwalk, Connecticut 06850 Filed January 5,1968, Serial No. 696,066 1 Claim (CL 42-65). 3,503,150 CARTRIDGE HOLDER FOR A REVOLVER Werner 0. 8runhuber, Stamford, Connecticut (19 W. 24th St., New York, New York 10010) and William C. Bye, 169 Cypress Ave., Bronx, New York 10454 Filed March 8, 1968, Serial No. 711,701 6 Claims (Cl. 42-89). 3,503,299...

Combat Ammunition

The 20mm x 139mm cartridge is available as HEI projectile with tracer (DM 51 A 1) and as API projectile with tracer (DM 43). Fixed ammunition 20mm x 139mm developed and manufactured by Rheinmetall is in use by the Deutsche Bundeswehr. It is employed in the Mk 20 1 and Mk 20 Rh 202 rapid-firing guns. Rheinmetall has developed combat and practice ammunition ior the various duties of these weapons. The cartridge is identical for the two types of ammunition.

Revolver Cannons

Chapter 45 - The Revolver Chapter 46 - 20mm M39 (T160) Revolver Chapter 47 - 30mm Aden Aircraft Camion Chapter 48 - 30mm T168 Series Machine Chapter 49 - 37mm T172 Revolver Chapter 50 - 30mm Automatic Gun T182 Chapter 51 - 30mm T221 Short Drum Revolver Chapter 52 - 7.62mm Heligun Chapter 53 - 30mm Revolver Cannon Section I. 30mm GAU-9 Aircraft Gun Chapter 54 - 30mm DEFA 553 Aircraft Chapter 55 - 7.62mm Externally Powered Armoured Vehicle Machine Gun (Prototype) 447 Chapter 56 - The Chain Guns -...

M39a3 Machine Gun Round

2,981,023 SEALING OF REVOLVER FIRING CHAMBER Dimitry B. Sergay Clawson, Mich. assignor to General Motors Corporation Detroit, Michigan a corporation of Delaware Filed June 22, 1959 Ser. No. 821,816 2 Claims (CL 42-59). 2,981,024 CARTRIDGE LOADER FOR A TUBULAR MAGAZINE Eugene Skoff 3531 S. 57th Court, Cicero, IIL Filed Oct. 22, 1959 Ser. No. 847,980 9 Claims (CL 42-87). 2,981,151 IGNITION SYSTEM FOR CASELESS ROUNDS IN OPEN BREECH TYPE GUNS Thomas Stevenson 1039 Arthur Ave. Huntingdon Valley, Pa....

Section Hughes Tool Company

The T154 was developed by Hughes Tool Company. It was monitored by the U.S. Army, and was, in fact, part of a U.S. Air Force T154 program for the development of a Tail-Turret weapon. The work began in September 1954 and ceased with the submitting of the final report on May 31, 1956. An earlier contract from February 1953 to November 1954 covered the preliminary work on the wreapon. The T154 weapon had reached a stage of development to be no more than a single shot firing fixture. Much of the...

Edgewater Buffer Disassembly

CROW Grenade Launcher 513 Dardick, Debrame Cannon 391 DEFA DEFA 553 Gun 443 Degtyarev Locking System 257 Delinking Feeder 79, 80, 187 Dixon Research 263, 268 Deutsche Bundeswehr Testing Grounds 311 Eastern Metal Parts Corporation 470 Edgewater Buffer Spring 22 Edwards Air Force Base 161 Eglin Air Force Base 9, 27, 59, 61, 67, 69, 70, 97, 114, 119, 129, 134, 441, 444 Eisen Electronic Control Unit 168 Emerson Electric Co____32, 47, 57, 82, 95, 119, 122 Equalizer Armament System 171, 172, 174,...

The Machine Gun

Linkless Feed System

During recoil, the bolt carrier produces, through its two-sided feed curves (1), a cross movement of the feed plates (2) and thereby the belt feed. Searing. On the rebound of the breech on the buffer, its sear (1) slides through under the trigger catch (2). The latter lies in front of the sear. The open breech is caught. By actuating the trigger (3), firing can be repeated. In continuous fire, the trigger catch remains withdrawn from the trigger. The breech cannot be caught and slides...

Mm HS Thunderball

This Hispano 30mm cannon was designed principally for equipping armoured vehicles of mechanized forces. The patent applications were filed inl968, and the development of this gun commenced two years later. The Thunderball, a 30mm cannon fires the well known HS 831 ammunition thus offering a far greater increase in fire power and effective range in both antiaircraft and ground fire than any similar weapon system in the United States inventory. Its advantages are obvious when it is realized that...

Christakos Semi-automatic Rifle

3,445,047 MUZZLE PATCH FOR FIREARMS Charles Rex Hoad, 260 East 1100 North, North Salt Lake City, Utah, 84054 Filed November 15, 1967 Serial Number 683,244 4 Claims. (CI. 42-1). 3,455,202 LIQUID PROPELLANT-ACTUATED DEVICE Glenn R. Dixon, Brecard, N.C., and David Findlay, Guilford, Conn. assignors to Olin Mathieson Chemical Corporation a corporation of Virginia Filed January 25,1968 Serial Number 700,439 3 Claims. (CLB9-7). 3,455,203 MULTI-LINEAR NOZZLE BALLISTIC ATTENUATOR OF RECOIL, BLAST FLASH...

Section Iv Olin Mathieson Chemical Corporation

A contract was awarded to the Olin Mathieson Chemical Corporation on November 23, 1955. The object of this T154 contract was to design, develop, fabricate, and test a sufficient number of rounds of Fiberglass wrapped cases, 30mm ammunition, with a self-contained chamber to determine the feasibility of its application to a 30mm T154 type Aircraft Automatic Gun Mechanism. Prior to this contract, Olin had engaged in several corporation sponsored studies to evaluate the commercial and military...

Oerlikon

The breech is in the rear position (the sear holds the breech in the cocked position). The sear carrier lock prevents any downward movement of the sear carricr. By lifting the trigger catch, the trigger slide, and with it the sear carrier lock, is slid forward, so that the sear carricr with the sear is pressed downwards by the breech, which is under the pressure of the compressed breech return springs. The sear slide is pushed forward by the springs and thereby holds the sear...

July

3,195,259 TRIGGER GUARD SAFETY FOR DUAL TRIGGER FIREARMS Robert Meunler, New Bedford, Mass. assignor to the United States of America as represented by the Secretary of the Army Filed February 15,1965 Serial Number 432,907 5 Claims (CL 42-70). (Granted under Title 35, U.S. Code (1952), sec. 266). 3,195,407 LIQUID PROPELLANT PROJECTILE UNIT Charles F. Turner, Mount Carmel, Conn. assignor to Olin Mathieson Chemical Corporation a corporation of Virginia Original application May 7, 1963 Serial...

Springfield Armory

In the 1950's, a program was initiated to develop a new lightweight short range anti-aircraft weapon system. The project was known as the All-Arms Anti-Aircraft System, and was code named Project Octopus in September, 1956. The system was to be capable of being broken down into man portable pieces and was to be effective against low flying aircraft with speeds to 800 niph, at 1,000 feet maximum altitude, and 2,000 yards maximum range. To fulfil the requirement for this program, the Ballistic...

Description

Gau Rotor Assembly

Previous trade-off studies established a six-barrel calibre .50 weapon with a six-barrel alternative configuration of the optimum multi-purpose, multi-role design. This baseline design provides a maximum firing rate of 8000 shots per minute to meet fixed-wing air-to-air requirements and a lightweight three-barrel configuration with a 4000 shots per minute capability for helicopter utilization. It was also established that the gun design should accommodate the projected need for a self-powered...

Section Iii Armour Research Foundation

Locating Parts Fixture For Machining

The Armour Research Foundation's (ARF) T154 gun employing combustible case ammunition represented great effort in attempting a departure from conventional ammunition resulted in a broad U.S.A.F. T154 development program. Armour Research Foundation (ARF) performed work on Feasibility Study of30mm Automatic Aircraft Gun, T154. On the basis of two of the eleven weapon designs evaluated under that program, ARF was requested to submit a research proposal for the design, development, and testing of a...

History

In May 1957, Dixon Research, developer of the T173 calibre .60 automatic gun, began work on a 20mm weapon to compctc with the T220E1. The new model, designated the T220E2 had a dual-position sear and an improved charger. The recoiling bolt, instead of the recoiling barrel group as in the T220E1, supplied the energy to operate the feeding mechanism of the T220E2. The T220E2 weapon was a direct descendant of the T173 gun and its construction was similar to the 37mm T37 gun. The T220E2 was...

Top View

XM174E1 40mm Automatic Grenade Launcher The sequence of operations of the grenade launcher in automatic fire is the trigger and trigger bar are pulled to the rear, disengaging the hammer sear from the hammer. The hammer under spring pressure from the hammer spring, rotates upward, striking the firing pin, which ignites the percussion primer. The cartridge in the chamber fires, expelling the projectile and blowing the bolt rearward. The recoiling bolt cocks the hammer via a cam and picks up the

November

3,618,245 DEVICE FOR BALANCING GUNS Gene M. Pruonto, 124 E. 1st Ave., Altoona, Pa., 16602 Filed March 3, 1969 Serial Number 803,566 7 Claims. (CL 42-1 R). 3,618,246 FIRING CHAMBER FOR CASELESS CARTRIDGE William B. Woodring, Stony Creek, Conn. assignor to Olin Corporation Original application May 7, 1968 Serial Number 727,164 Divided and this application February 4,1970 Serial Number 8,637 1 Claim. (CL 42-16). 3,618,247 SHORT THUMBING TWO-STEP ABUTMENT FOR FEEO LATCHES Adolph L. Nelson, Detroit,...

Philcoford

The Philco-Ford GAU-7 A Phase III 25mm gun employs five rotating barrels and fires fully-telescoped caseless ammunition at selectable firing rates of 3,000 and 6,000 rpm. The gun incorporates an ammunition-rammer sprocket and a receiver sprocket located side by side and contained within a main bearing and chamber housing. Nine linkless chambers rotate about and are passed between the receiver and rammer sprockets. Chamber retention, transport, and positioning are provided by a system of rollers...

Harrier With Gun Pods

Canne Electric Defense

12 U 25mm Gun and Linear Linklcss Feed systems. This turret is to provide the U.S. Marines with a tactically flexible weapon system to defeat assault helicopters, strike aircraft and ground armor. The two-man turret provides a 360 field-of-fire. The Linear Linklcss Feed container is located on the azimuth function inside the crew-served vehicle and contains 500 rounds of ammunition with on-board reload capability. The Equalizer fires at 2200 shots per minute and is electrically driven. Reverse...

Calibre T Series M Machine

Machine Gun Magazine Series

Calibre .50 M85 Machine Gun (fixed left rear view) In January 1956, work was concentrated on the T175 program and development of the other three guns was ceased. The T175, which Aircraft Armaments, Inc. began working on in January 1952 under contract with Springfield Armory, was short recoil operated with a hydraulic accelerator. The accelerator caused considerable difficulty, particularly in cold weather. Therefore, in November 1955, the T175E1 was designed, which incorporated a mechanical...

Nosl

Ruger Mark Assembly Instructions

Strength of the bolt and the barrel extension and also improve the gun for production purposes. At that time the M50 series round was decided upon as the Tri-service 20mm round. On 24 July 1968, the original funding had been expended and work ceased on the Mk 22. In November 1968, funding resumed for adapting the Mk 22 to fire the 30mm round, thus becoming the Mk 22 20 30mm. By May 1969 three new prototypes had been made and test fired. The rest of the history of the Mk 22 is embodied in the...

Grenade Launcher Story

The most significant weapons concept development of the past two decades is the automatic grenade launcher. These weapons were virftially unknown prior to the Southeast Asian conflict. They have had a significant impact upon the antipersonnel tactics employed by the armed forces. The development of the grenade launcher concept has been closely related to the increased military use of small boats and helicopters as well as to the need for better fixed position and vehicular defense. A number of...

Mm Hs C Mc Maremont

The MC-23 was designed during 1966 to 1970. The 23mm was designed specifically for the United States Army BUSHM ASTER requirement. In 1971, Maremont acquired the rights to the 23mm gun and ammunition and completed a concentrated eftort with its Bushmaster team members to finish the development so that operational hardware could be supplied to the United States Army for the Validation Phase. The MC-23 represented the optimum Bushmaster calibre weapon system in terms of performance, reliability,...

Rotor Assembly

Vintage Guns And Ammo Magazines

The trackways for the gun bolts are bolted to the rear rotor. The rear most tracks have quick disconnect provisions for installing and removing the gun bolts. This completes the rotor assembly. It is shipped rearward into the gun housing until the major rotor bearing seats on its mating shoulder on the forward diameter of the gun housing. The rear of the rotor is only radially supported by a bearing that is assembled between the rotor and the housing. A new bearing retainer and...

May

2,745,203 FIREARM CARTRIDGE PROTECTOR Carl E. Ruple, Colorado Springs, Colo., assignor to Olin Mathieson Chemical Corporation, a corporation of Virginia Application May 20, 1952, Serial No. 288,815 5 Claims. CI. 42-50 . 2,746,357 FEED MECHANISM Paul H. Dixon, Rockford, III., assignor to the United States of America as represented by the Secretary of the Army Application April 14, 1950, Serial No. 155,893 9 Claims. CI. 89-33 . 2,747,313 8ARREL TO RECEIVER CONNECTION ON A FIREARM Lexie Ray...

Dod

The ammunition development was done primarily by Aerojet-General Corporation. General Electric, Aerojet-General and Amron Corporation worked together to establish compatibility between the weapon and the ammunition. The link design was done by Roy Sanford Company in conjunction with General Electric and link production was by Mechanical Products, Teledvne Company. The program produced one prototype gun, four different 27.5mm rounds and development of the 27.5mm weapon, link and ammunition...

Duc Machine

3,025,765 SEGMENTED RING-TYPE REFRACTORY METAL LINERS FOR GUNS Robert F. Baker, Butler, N.J. assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa. a corporation of Pennsylvania Filed Jan. 30, 1952 Ser. No. 268,974 2 Claims CI. 89-16 . 3,025,766 CARTRIDGE BELT FOR AUTOMATIC WEAPONS Hartmut Menneking Dusseldorf, Germany, assignor to Firma Rheinmetall G.m.b.H. Dusseldorf, Germany Filed Oct. 6, 1959 Sdr. No. 844,687 Claims priority application Germany Oct. 7,1958 2 Claims CI. 89-35 ....

January

Snyder, Woodbridge, Conn. assignor to Olin Mathieson Chemical Corporation, New Haven, Conn. a corporation of Virginia Filed Nov. 6,1961 Ser. No. 150,581 3 Claims CI. 42-1 . 3,118,243 RIFLED BARREL FOR FIREARMS Jack C. Manshel, P.O. Box 186, Palmdale, Calif. Filed May 17,1961 Ser. No. 110,688 1 Claim. CI. 42-76 . 3,118,342 BORE EVACUATOR FOR CANNONS Alfred A. Campione, Rotterdam, and Herman A. Tobonsky, Colonie, N.Y. assignors to the United States of America...

Hispano Hs 827 Cannon

30mm Cannon Ammo Side Side Comparison

This chapter includes a family of four advanced rapid fire weapon systems, the 20mm HS 827-B Hurricane, the 23mrn HS 827-C MC-23, and two 30mm cannons, the HS 836 Spitfire, and the HS 837 Thundcrball. These four cannons were originally developed during 1966 to 1970 by Hispano-Suiza, Geneva, Switzerland. Only these few guns were built before the Hispano-Suiza firm was purchased by Oerlikon in 1971, who acquired all the rights to the guns. The HS 837 Thunderball was the last member of the...

Charles Packard M16

3,483,648 ANTI-RECOIL FIREARM Stephen Speckhart, 78 Lexington Ave., Maplewood, N.J., 07040 Filed March 1, 1968 Serial Number 709,728 10 Claims. CL 42-10 . 3,483,793 PISTON-RAMMER COMPRESSION IGNITION ASSEMBLY Marcus Ramsay, New Haven, Conn. assignor to Olin Mathieson Chemical Corporation a corporation of Virginia Filed March 4, 1968 Serial Number 710,127 2 Claims. CI. 89-7 . 3,483,794 GUN BARREL FOR SILENT LAUNCHING OF A PROJECTILE Charles F. Packard, Bettendorf, Iowa assignor to the United...

Gun Barrel Rifling Machine Homemade

Homemade Muzzleloader Revolver

Weight complete with light barrel 47.3 lbs. Weight of Light Barrel 14.4 lb. Weight complete with heavy barrel 49.9 lb. Weight of Heavy Barrel 17 lb. Length of Weapon with barrel 72.4 in. Length of Receiver without barrel 43.6 in. Length of Barrel with flash hider 41.6 in. Length of Rifled Bore approx. 32 in. Number of Lands and Grooves 8 Twist Right Hand, one turn in 15 in. Headspace. Barrel Changing Fixed Headspace Timing Locking Fixed Timing Feeding Rotating Sprocket, Disintegrating Operation...

Grenade Launcher

Experimental Malfunctions

Ejection powered solely by the energy generated by the explosion of the propcllant charge, something nonexistent at that time. Without the need for auxiliary power sources, this weapon could be mounted in various installations such as riverine patrol boats, helicopters, vehicles, or even on tripods for ground use. So, in July 1966, the Naval Ordnance Systems Command, Washington, D.C., commissioned the Naval Ordnance Station N.O.S. , Louisville, Ky., to develop, on a maximum-effort basis, two...

Hughes Tool Company Presently McDonnell Douglas

7.62mm Externally Powered Armored Machine Gun EPAM The weapon was designed, built and tested during the period between September 17, 1970 and May 30, 1972. The work was done under contract for the U.S. Army weapons command. One firing fixture was built and tested. The prototype was fabricated and designed simply. The receiver, motor housing and gearbox were all assembled from aluminum and steel plates bolted together. No attempt was made to reduce the weight or bulk of the structure. It is...

AprH

3,027,672 FIREARM WITH ALUMINUM ALLOY RECEIVER George C. Sullivan, 3085 Lake Hollywood Drive Hollywood, Calif. Continuation of application Ser. No. 652,601 Spr. 12, 1957 This application April 26, 1962 Ser. No. 105,812 14 Claims Cf. 42-16 . 3,027,673 LOW BARREL REVOLVER John R. Oliver, Boston, Mass. 3371 Main Road, Tiverton, R.I. Filed March 26, 1957 Ser. No. 648,569 8 Claims CL 42-65 . 3,027,674 SAFETY LOCK FOR REVOLVERS James F. Mahan 21 Standish St. Cambridge, Mass. Filed June 9, 1959 Ser....

Cycle of Operation

Cycle Operations For Guns

The basic gun, sliding in the cradle along the receiver guideways, consists of sub-assemblies that can be disassembled without tools the barrel, with swivelling muzzle brake the recoil springs and rearming assembly the triggering electromagnet The 7 rifled barrel, made of a special nitrided steel, is equipped with a muzzle brake that can take two different positions. It is provided with two side gas ports transmitting pressure to two side pistons that actuate the parts responsible for automatic...

Simple Homemade Submachine Gun Plans

Firearm Misfire

After the trigger is released, there is a 350 milliseconds delay before the motor is shut off. This delay allows the feeder to declutch and assures that a round is not in the chambcr. During a misfire the recoil drives the recoiling mass beyond the normal turnaround point, thereby mechanically tripping the misfire mechanism. The coil spring in the misfire mechanism declutches the

Maremont Corporation

The M60 machine gun, originally designated T-161E3, is the result of a series of designs started near the end of World War II at Springfield Armory. The first of these was called the T44 and was essentially a combination of the belt feed mechanism of the German MG42 with the operating mcchanism, rotating bolt, of the FG42 automatic rifle. In turn, certain features of the FG42 were taken from the US designed Lewis Gun used in World War I. A less extensively modified version of the T44 was the...

Armour research foundation

Although in 1951 a T37-type bolt action automatic gun had been selected on the basis of Ballistic Research Laboratory studies as probably the best type to be developed for an interim light anti-aircraft weapon, it was decided from the outset of the project to consider a 37mm revolver gun as a competitive development. This gun was designated the T172. The principle of a revolver-type high-velocity, high-cyclic-rate gun, as employed in the German Mk 413 had been successfully applied in the T130...

Mm M T Revolver Gun

How Works Ww1 Machine Gun

The basic principles of the calibre .60 Revolver Gun T130 M38 and its 20mm version, the T160 M39 Revolver Gun. were conceived in the Mauser Works in Germany after the end of hositility of World War II. The Germans fabricated several models, designated as 20mm MG213C and 30mm MG213 and sent them to the United Kingdom. Two guns were shipped to the United States, one of which was assigned to Springfield Armory and the other to Wright Field in Ohio. In 1946 Springfield Armory studied the German...

Liquid Popellant Rifle

Caseless Gun

UNUSUAL AMMUNITION CONCEPTS, EXPERIMENTATIONS AND TESTS Within the gun armaments community in recent times, there has been a noticeable trend to depart from the classical, bottleneck type configuration of ammunition. These new trends include, in addition to the otherwise familiar liquid propellant and caseless systems, such concepts as cased-telescoped both rectangularly and cylindricallv shaped , separate loading ammunition and folded ammunition. Folded ammunition is a unique design in which...

Philcoford Corporation

Philco Ford Corporation

7.62mm Advanced Armored Vehicle Machine Gun - Concept Feasibility Model On August 20,1971, the Philco-Ford Corporation completed a 15 month program to deliver an operating test model for an Advanced Armored Vehicle Machine Gun to the United States Army Weapons. Command at Rock Island. This work was based on a company sponsored program begun in 1969, the aim of which was to develop a replacement for the M73 machine gun. In addition to the usual types of modifications made during the development...

Avenger Gau 8 A

Avenger Gau

When the trigger signal is removed, the ECU keeps the forward solenoids energized for 70 milliseconds plus six rounds to achieve a proper clearing sequence. The ECU then energizes the reverse solenoids of both motors to stop the gun and cause it to run backwards for six consecutive fired rounds, plus two rounds. The reverse solenoids arc then dccncr-gized to complete the action and stop the gun. A pilot override can start a new burst without completing the clearing cycle. Applications of the...

Mm Mk Automatic Gun

Automatic Machines Guns

HUGHES TOOL COMPANY Presently McDonnell Douglas During the early 1950's, development of this weapon was conducted in parallel programs at both Hughes Tool Company and the Naval Gun Factory under Bureau of Ordnance sponsorship. Overall objectives included conversion of the 20mm Mk 12 gun to a long-barrel version capable of firing the then existent 30mm Aden round, and the development of a new design 30mm short-barrel gun for turret installations. For a variety of reasons program development was...

Pressure Block Locking Surfaces

Remington Model 742 Exploded View

View Showing Start of Ramming Stroke View Showing Extractor Striker on Slide, and Extractor View Showing Engagement Bctwocn Drum Rollers and Actuating Slide slide forward switch tongue, which pivots about its forward end. The position of this switch tongue determines which cam path is made continuous throughout its length. Underneath the slide is a cam which engages a stud on the switch tongue or a spring-loaded pin within the stud. This cam is designed so as to cause the switch tongue to move...

Case Ejection Chute

Marlin Rifle Exploded View

The earn is heavily spring loaded to its open position. The cam is a high strength plastic molding with a brass insert. The insert has a connection means on its side for fastening the lead. On the surface of the cam that contacts the bolt's vertical pin, the insert is flush with this surface near the end of the contact surface. The action is that as the vertical pin approaches and contacts tliis surface, it is cammed down mechanically. A gun rotation continues the vertical pin still down then...

Cases

Breech Bolt Assembly Clearing Cycle

The cartridge is fully in place at point one. It also took 30 to enter the gun along a somewhat tangential path. At 6000 spm these functions take about five milliseconds each to perform. The same takes place at the breech end of the function diagram. Locking takes about 15 to execute. It starts 15c before point two and is completed at point two. The firing pin needs 3 to extend and the pin is protruding at point two. Breech gas build up and projectile exit from the muzzle takes three...

Revolver Cannon

The entire gun except for the mounting flange was allowed to recoil. The gun was also lightened and made more compact by reducing the revolver cylinder to four chambers instead of five. To complete the post-war picture, Otto went to Springfield in 1947 where a captured 213C, rebuilt by the Naval gun factory, was renumbered T-74. The T-74 progressed in 20mm through the T-110 and the T-160 which was type classified as the M-39. There were also several 30mm versions of the MG-213C-typc gun studied...

Belt Feed Slide

Feeding Bolt Fully Forward, Belt Feed Slide in the Cover and Ammunition Belt held in the Feedway by the Belt Holding Pawl rear view . extension is checked by the oil buffer and its spring this buffer spring serves to drive them forward again. This motion locks the bolt to the barrel, thus again preventing the case from being driven toward the rear. The last forward motion of the bolt and barrel causes the firing pin to strike the cartridge, providing a means of releasing the scar is furnished....

Philcoford Maremont Corporation

40mm XM129 High Velocity Grenade Launcher Work began on the XM129 in 1963 for the purpose of reducing the mounting difficulties inherent in the M75 Grenade Launcher. However, the basic principle of operation remained identical with the M75. Between 1963 and 1971, Philco-Ford s Acronu- tronic Division developed the weapon and produced the first 1,355 guns for use on the M28 and XM51 helicopter armament subsystems. Those systems were for use on the Cobra and Cheyenne helicopters, respectively. In...

Ammunition Development And Unusual Weapon Concepts

Unusual Concepts, Experimentations, and Chapter 69 - The Open-Chamber Concept and Its Application to the 30mm T154 Gun Design Section I. Hughes Tool Section III. Armour Research Section IV. Olin Matheson Chemical Section V. Aircraft Armaments, Section VI. Section VII. Latest Chapter 70 - The Junker PART XVII - RELEVANT PATENTS IN PUBLIC IX MAIN 1952-1971 Mandator '' compliancc posted in all offices controlled by the Bureau of Ordnance and the Bureau of...

Ee

Rifle High Rate Fire 8000 Spm

Caliber 7.62mm NATO Std Rate of Fire 600 spm Weight 29.5 lb Dimensions 31.3L x 4W x 5.8H Date Developed 1970 Number Produced 1 Prototype Gas operated, linear-action chamber mechanism. Hand-held weapon with 64-round magazine, fires three-round burst. Caliber 5.56mm NATO Std Rate of Fire 8000 spm Weight 10 lb Dimensions 43L x 4.8W x 5H Date Developed 1970 Number Produced Mock-up Concept demonstrator for an Advanced Light Machine Gun ALMG with a lockless breech mechanism. Hand-held and bipod...

Contents

Chapter 25 - 7.62mm M60 Machine Gun Section I. 7.62mm M60E2 Machine Section II. 7.62mm XM7 Helicopter Armament Chapter 26 - 20mm AMR M621 Automatic Chapter 27 - 35mm Anti-Aircraft Gun Section I. 35mm Mk 352 Machine Chapter 28 - 30mm XM140 Machine Chapter 29 - 25mm TRW-6425 Automatic Chapter 30 - 20mm Mk 20 Rh202 Machine Chapter 31 - 20mm HS 827-B Hurricane, 23mm HS 827-C MC-23, 30mm HS 836 Spitfire, 30mm HS 837 Chapter 32 - 30mm X21E2 Automatic Chapter 33 - 30mm Lockless Automatic Gun Chapter...

Roger Marsh Hudson Ohio

2,865,126 OPEN CHAMBER GUN David Dardick, Greenwich, Conn., assignor to Dardick Corporation, a corporation of Delaware Application September 3,1954, Serial No. 454,045 12 Claims. Cl. 42-60 . 2,865,127 TRIGGER FINGER REST FOR FIREARMS Thomas J. Finnegan, Los Angeles, Calif., assignor of one-half to Robert Swan, Los Angeles, Calif. Application September 12, 1955, Serial No. 533,731 4 Claims. Cl. 42-69 . 2,865,254 RECOILING BARREL OPERATED PIVOTED LOADING TRAY MECHANISM Henry Wilhelm Aldrin,...

Rounds Counter

20mm Aircraft Automatic Loading System

Similarly, once this armament system has been removed, the aircraft can accept the original missile system. New ammo is conveyed to the gun from the drum. It is fired, and the empty cases, duds and cleared rounds are returned to the drum. New ammo is loaded at the gun's feeder location. Empties, duds and clcarcd rounds arc discarded while loading. The firing rate is 4500 spm. Automatic gun clearing is provided after each burst. The total ammunition load is 650 rounds of M50 type 20mm....

Firing Barrel

Double End Linkless Feed System Schematic placcd in a convcyor one at a time and is transported to the gun. At the gun, the transfer unit takes the ammo from the conveyor and delivers it to the gun bolt. The ammo is fired or is a dud , and at gun ejection the empty case or dud is given back to the transfer unit. As the empty conveyor is passing through the transfer unit, the ammo is being fired so that the empty case is placed in the conveyor just before it leaves the transfer unit. The empty...

Honeywell

Tion and the crank is turned to the detent in the 4'LOAD position. The tab is then pulled as far as possible to the right and maintained. The crank is turned clockwise V2 turn to allow the rotors to collect the round, locating it into the formed chambcr. The firing pin is retracted and turned to the FIRE position. The weapon is now ready to fire. The first round will fire when the crank has been turned clockwise approximately 30 . The weapon will continue to fire one round for each half r...

Front Gun Support Feeder

130 Gunship

ROUNDS COUNTER CLUTCH BRAKE SYSTEM rather than returning them to the drum for storage. The Linkless Feed System contains 1200 rounds of 20mm ammo of the M50 series. The pod has a built in loader at the exit to the drum. It can be loaded by an external handcrank that back-loads ammo into the storage drum. The incoming ammo is belted, and its link is stripped at the loader and discarded out of the pod. Gun clearing Hold-Back is provided at the end Tail defense was provided to the U.S. Air Force...

Aircraft Double Ended Linkless Ammo System

Vulcan Gun System

Loading is accomplished by using the Linkless Ammunition Loading System LALS for reduced aircraft turn-around time. The F-16 is also compatible with the delinking loader Ml4 link . 1 lold-back gun clearing takes place after each burst. Gun clearing takes place after each burst automatically during gun coast down from steady state firing rate. The gun bolts are placed in a hold-back condition to avoid cook-offs. F-16. The U.S. Air Force F-16 air combat Fighter is armed with the Vulcan M61A1 20mm...

Hispanosuiza

RELEASED, BREECH BLOCK DRIVING ROUND INTO CHAMBER BLOCK LOCKED,RRWG FIN FULLY FOR WARD, CAP OKD SHELL LEFT GUN,GAS PISTON PUSHES BACK UNLOCKING PLATES The Mk 16 Machine Guns are modified M3 and M24 Automatic Guns. The major change being the addition of a recoil operated chamber lubricator in order to eliminate the need to hand lubricate the ammunition. No complete guns have been produced since the end of World War II. The history of the Mk 16's can easily be traced to the 20mm Birkigt type 404...

Arthur Wennerstrom

3,129,636 MEANS FOR LAUNCHING PROJECTILES Richard G. Strickland, Stewartstown, Pa. and Arthur J. Wennerstrom Zurich, Switzerland, assignors to Aircraft Armaments, Inc. Cockeysville, Md. a corporation of Maryland Filed Sept. 28, 1960 Ser. No. 59,014 3 Claims Cl. 89-1.7 . 3,129,637 SAFETY SEAR MECHANISM FOR BLOW BACK BREECH ACTION Charles F. Packard, East Longmeadow, Mass. assignor to the United Slates of Amcrica as represented by the Secretary of the Army Filed Sept. 17,1963 Ser. No. 309,579 7...

Xm

Hgs Gun System

40mm grenade launcher system for fight helicopters. Can be interchanged with HGS-5, HGS-55 and XM27E1 systems. Flexible elevation only mounting. Uses M129 High Velocity Grenade Launcher. Weight 120 lb empty. 238 lb loaded Capacity 150 round rotary magazine Number Produced 8 7.62mm flexible elevation only gun system for light helicopters. Uses EX-34 gun. Similar to HGS-5 Helicopter Weapon System. Weight 90 lb empty, 218 lb loaded Capacity 2000 round box magazine Number Produced In Production

Gun Barrel Cutaway

A mechanical feeder similar to the feeder used on the Mk 19 grenade launcher was to be utilized instead of a gas feeder. The decision to tollow the original EX-6 design was based on the following points It does not utilize ram-type loading. It does away with gas operation. It is adaptable for high or low firing rates. The in-line action eliminates bending and reduces trunnion loads. It does not use an extractor or ejector. It has an inexpensive, stamped steel receiver....

GAUA Ammunition

Air Force to procure 30mm ammunition for the A-10 aircraft system have proven to be exceptionally efficient. The 30mm GAU-8 A ammunition program began in 1972 in support of the GAU-8 guns to be installed in the A-10 aircraft. Because of the tight schedule imposed for the A-10 system, the U.S. Air Force decided to break with tradition and use industry to build the ammunition. Previously ammunition of this calibre size had been developed and built by the U.S....

Links

225 25mm Gun

For helicopter applications, air-to-air capability is improved dramatically with 25mm, including increased effectiveness against light armored vehicles. The two standard series of 25mm ammunition are percussion primed and steel cased. The M790 series include TP, HEI and APDS, while the newly developed GPU 20 U series provides API capability for high performance aircraft.

Bolt Design

Gun Silencer Diagram For Pistol

The XM-188E1 bolt is a drop-head type. The bolt body is machined from a high strength 17-4 investment casting and is case hardened. The bolt is guided in the rotor tracks by two fixed front feet which are an integral part of the bolt body, and by two pivoting rear feet, of electroless nickel plated maraging steel, separately installed at the rear. Side guide surfaces, which contact mating surfaces in the rotor, are machined into the bolt body. The bolt cam follower is a 1 inch 2.5 cm diameter

Amefrance

To lower reliability over that of the less complex designs. The AME 621 20mm machine gun's name was derived trom the letter A, which stands for Atelier, meaning shop or factory. The letters M and E are the first and last letters in the name Mulhouse, which is the town where the gun was made. The numbers 62 stand for the year the gun was invented, 1962, and 1 means it was the first gun made. The AME 62120mm machine gun is an air cooled, self-powered, open-bolt, gas-operated, belt-fed, weapon...

Rapd C

Color Identiiication and Typical Marking of Artillery Projectiles The Projectile Mk 11 Mod 0 of the HPT round is loaded with cast or powdered lead. The Projectile Mk 12 Mod 0 of the LPT round has no filler. Both types use Electric Primer Mk 47 Mod 0. HPT and LPT cartridges have green projectiles with lettering in black. These cartridges are also marked on the cartridge case with 1 4-inch black letters reading, High pressure or low pressure test cartridge ' Lot prefix letters are not assigned to...

Ammunition and Links

Machine Gun Ammunition Magazine

The company Is active in ammunition and link development to support Its gun programs. Produced more than five million Mk 6 ammunition links for use with 20mm Mk 11 Gun System. Developed lockless, plastic encapsulated, telescoped cartridge. Directed 30mm ammunition development and qualification for the AH-64A Apache. This 105mm Howitzer gun installation in the Douglas A-26 aircraft during World War tl was the largest fixed, forward-firing gun installation ever flown.

Puff The Magic Dragon Machine

1964 accompanied by troubleshooting meetings and tor trials and was in combat with Miniguns by redesigns with General Electric. December 1964. Side-Fire which was the application of M37 The Miniguns were mounted in their prototype machine guns firing out the port windows of a C-47 gun pods SUU-11 A inside the AC-47 at this time, at ground targets was also in test at Eglin Air Force However, earlier contracts had the improved design Base. They had difficulties obtaining a desired mag- SUU-11 A...

Mm Microgun Pod Description

The 5.56mm Microgun pod is an externally-stored gun pod for use on light aircraft and helicopters where accurate, concentrated firepower with minimum weight is required. The pod can be provided with an ammunition capacity from 1500 to 3500 rounds with an approximate loaded weight from 186 to 300 pounds, respectively. The nominal rate of fire is 6000 spm however, multiple firing rates such as 1000, 6000 and 10,000 spm are available. The pod utilizes the 5.56mm Microgun and a linkless feed...

Section I

HUGHES TOOL COMPANY Presently McDonnell Douglas Sparked by DOE interest in already developed foreign guns, the U.S. Air Force contracted with Hughes to provide a gun system incorporating two 30mm 304Rk Oerlikon aircraft guns capable of firing aluminum cased Oerlikon ammunition. Hughes first became involved in this program through its unsuccessful proposal effort on the GAU-8 Close Air Support Gun program. Following the selection of prototype GAU-8 competitors, the Air Force Armament Laboratory....

Description and Purpose

The M39 gun is a single barrel, gas-operated, belt-fed, electrically fired, five chamber revolver type weapon, designed so that ammunition may be fed either from the left or right side. It is utilized by fighter aircraft as an offensive high cyclic rate weapon. The gun is presently employed only in forward firing fixed mounts and is dependent on the flight attitude of the aircraft for target alignment. There are presently two versions in use, the M39A2 and M39A3. The difference between the two...

Fabrique Nationale

Fabric National Machine Gun

In 1958, during the Korean War, Fabrique National developed a reliable, versatile family of automatic weapons, among them a GPMG General Purpose Machine Gun now known as the MAG-58 and chambered tor the then newly introduced 7.62 x 51mm NA TO cartridge. The MAG-58 is currently employed by the armed forces of ninety countries, including the U.S. In 1978 the Army, with its new Ml main battle tank still in the development stage, saw the need for a high performance, coaxial tank machine gun and...

Grenade Launcher Machine Guns

Chapter 57 - The Grenade Launcher Chapter 58 - 40mm Mk 18 Mod 0 Multiple Grenade Chapter 59 - 40mm M75 Grenade Chapter 60 - 40mm XM129 High Velocity Grenade Chapter 61 - 40mm High Velocity XM175 Grenade Chapter 62 - 40mm XM174 Automatic Grenade Chapter 63 - 40mm Mk 20 Mod 0 Grenade Chapter 64 - 40mm Grenade Launcher Chapter 65 - 40mm Mk 19 Grenade Chapter 66 - 70mm Automatic Grenade Launcher Chapter 67 - 70mm Automatic Grenade Launcher

Mauser

Ing the cases to stick in the chamber. When this happened, the extractor ripped the rim from the case base and the bolt would proceed to the rear without the case. Additional problems were experienced when the weapon chambered a round but failed to fire. When this happened the bolt could not be drawn to the rear, even after manual release of the extractor from the case rim. The locks were stuck and required considerable force to dislodge the bolt and draw it rearward out of battery position....

General Electric Feed System

The aircraft configuration of the feed system for the General Electric GAU-7 A weapon system consists of two major assemblies, the storage assembly with a capacity of960 rounds and the transfer assembly. In the proposed installation, the storage assembly is located behind and to the port side of the pilot, writh the transfer assembly carrying the rounds from storage to the gun located behind and to the starboard side of the pilot. The storage unit is 24 inches long, 28 inches wide, and 44.8...

Projectile Propellant And Crimp

Use of a pusher-type extractor in the folded configuration should eliminate or minimize extractor breakage which occurs with conventional systems. This is based on significantly greater contact area of the pusher rod on the folded case compared with the small contact area of the conventional extractor claw on the case rim. With conventional design, the case head is only partially supported in order to provide access for the extractor claw which is associated with the weapon's bolt. Thus the...

Principle Of Richard J Gatling

20mm Vulcan Rifle

M61 Al, CHAG. and GAU-8 A Machine Guns M61 Al, CHAG. and GAU-8 A Machine Guns At the close of World War II, it was realized by the U.S. Military that the new high speed jet fighter aircraft had changed the requirements for airborne guns. In air-to-air combat the time on-target was reduced to well below three seconds. This meant, to be effective and to score air-to-air kills, new guns were needed to supply more projectiles on target in a shorter time. More short bursts were needed also in a...

Rheinmetall

The Rh 202 was the 20mm gun selected by West Germany in a competition held in 1965. The gun was adopted and has been in production since 1969. Over 6,000 units have been built and Germany, Switzerland, and Italy use the weapon. The gun was demonstrated at Aberdeen in 1969 and was handled in the U.S. by Maremont for a short time. The Rh 202 underwent tests at Aberdeen in late 1974. The Rh 202 is gas operated and has a rigid breech block. The bolt is locked by two symmetrically arranged locking...