Figure Chasing gas cylinder thread

Bon has been removed, clean inside of cylinder and piston, oil very lightly and replace. Clean gas port with an 0.070-inch or smaller drill inserted by hand, or with piece of wire or similar instrument. Be sure to stake piston nut lightly in place when assembling. Note. Pistons, breech end of receivers, and other parts subjected to burned powder must be thoroughly cleaned. Scrub these parts with a bristle brush moistened with rifle-bore cleaner. (2) Rust. Rust is more likely to form on surfaces...

Safety Precautions

Some of the precautions to observe in handling the carbine follow. These precautions are not intended to replace other existing safety regulations. a. A carbine with its bolt closed is never considered to be safe until it is properly inspected. Do not playfully or carelessly point the carbine at anyone. Always consider the carbine loaded. c. Do not leave any obstruction in the muzzle or bore. d. Never push the selector forward to the automatic position while...

Figure

Cut in the lower right side to furnish clearance for the disconnector when assembled on the hammer pin (Fig. 49). (2) Sear. The sear (Fig. 52) of the carbine M2 is the same as the sear of the carbine Ml, except for a raised shoulder on the top of the front end, which forms a camming surface for the disconnector when operated. (3) Trigger housing. The trigger housing of the carbine M2 is the same as that of the carbine Ml, except that the left side of the magazine post is furnished with a...

Figure Trigger spring removal and installation

Inspect the hammer on a comparator where facilities are available. This applies to hammers removed from used carbines in general, new hammers removed from stores do not require comparator inspection. (2) Field or depot maintenance. Where comparators are not available check hammer for worn pinhole, burred or dented face or bolt cam, worn or burred plunger retaining slot, burrs, and rust. Check to see that cocking cam is in good condition and that the comer of the sear...

Lot Number

When ammunition is manufactured, it is given an ammunition lot number. This lot number is marked on all packing containers. It is also on the identification card inclosed in each packing box. The lot number is required for all purposes of record, such as grading and use, and reports on the condition, functioning, and accidents in which the ammunition might be involved. It is impracticable to mark the ammunition lot number on each individual cartridge. Every effort should be made to maintain the...

Total

1 to 5 6 to 10 1,000,000 to 1,249,999 Quality Hardware & Machine 1,550,OOOto 1,562,519 Quality Hardware & Machine 1,562,520 to 1,662,519 to 1,762,519 IRWIN PEDERSEN (Saginaw, G.R.) 1,762,529 to 1,875,039 Quality Hardware & Machine 1,875,040 to 1,907,519 Quality Hardware & Machine 1,907,520 to 1,937,519 National Postal 1,937,520 to 1,982,519 Irwin Pedersen (Saginaw, G.R.) 3,212,520 to 3,250,019 3,651,520 to 4,009,999 National Postal 4,075,000 to 4,079,999 National Postal Meter...

Cleaning Materials Lubricants And Rust Preventives

(1) Rifle bore cleaner is provided for cleaning the bore of your carbine after firing. It may be placed in the boite of your weapon after firing and left there for several hours until you can clean the weapon and apply a preservative oil. This material has rust-preventive properties. After using rifle bore cleaner, dry the fore and apply a thin coat of preservative lubricating oil. Rifle bore cleaner freezes at temperatures below minus 20 degrees F. If thawed rifle bore cleaner is used, shake...

Figure Checking head space

M14 Barrel Removal Headspace

Touches bottom to prevent damaging tap or cylinder. Remove tap and thoroughly clean chamber. b. Carbon and Rust. (1) Carbon. Because of the rearward position of the gas port and high gas pressure encountered there, excessive carbonization of cylinder and piston is unlikely. However, these parts should be cleaned at regular intervals, or when fouling or sticking of piston is evident the gas port in the barrel should be inspected and cleaned if necessary. Remove piston nut and piston from gas...

Firing Tests

Function Firing Following repair or complete rebuild, fire each M2 and M3 carbine 10 rounds full automatic and 10 rounds semiautomatic. Fire each Ml and M1A1 10 rounds semi-automatic. If carbines do not function satisfactorily, additional rounds are authorized. Function firing is required, in field maintenance, only when adequate facilities are available. Quality controlled function firing may be used provided the number of weapons to be function fired is sufficient to warrant. b. Function...

Mechanical Training

The officers and noncommissioned officers of your unit will teach you how to take the carbine apart and how to put it together. This is commonly called field stripping. You will learn the names of the parts of your carbine during instruction in field stripping. As your instructor names the parts, repeat them to yourself and name each part as you remove it and as you replace it. You will find that the parts are generally names for the job they do. For example, the trigger guard actually guards...

Cleaning Weapons Received From Storage

Carbines are received from storage with a coating of preservative lubricating oil or of rust-preventive compound. Carbines received from ordnance storage will usually be coated with rust-preventive compound. Use volatile-mineral-spirits-paint thinner or dry-cleaning solvent to remove all traces of the compound or oil. Take particular care that all recesses in which springs or plungers operate are cleaned thoroughly. Failure to do this may cause stoppages at normal temperatures and will...

Figure Operating slide assembly

Slide dismounting slot in the receiver limited design , and the rear slot mates with a small projecting lug in the rear end of the housing tube bed groove in the receiver. The lug should not be bent or burred, and the edges of slot should be clean. If lug is damaged or missing, replace the tube with a new one. Note. Do not use these early type receivers REPAIR AND REBUILD FIELD OR DEPOT MAINTENANCE a. In the early type receiver which contains the operating slide spring tube, if the retainer in...

Inspection

Carbine Connector

Inspect all parts for damage, excessive wear which might cause malfunction, burrs, rust, foreign matter in recesses, deformation and free action with mating parts. Reference is made below to pages in the preceding section for inspection of corresponding components of the trigger housing group. b. Trigger Housing Fig. 56 . See page 62 for inspection of the trigger housing. Also inspect the selector spring retention slot in left magazine post for foreign matter and positive spring...

Identification

The contents of original boxes may be readily identified by the markings on the box. Similar markings on the cardboard carton label identify the contents of each carton. The markings which appear on the box and carton give complete information necessary for identification, shipping, care, handling, and use. b. Identification of Ammunition Types. In general, all types of cartridges of one caliber look alike in shape and size, but they may be identified by certain physical...

Functional Check

For functional check of the trigger housing, hammer, trigger, sear, magazine catch, and trigger b. Set for semiautomatic fire. Squeeze the trigger, cock the hammer, and forcibly strike the grip of the stock with the heel of the hand several times. If the hammer falls, the group is not acceptable because it will tend to fire in an uncontrolled manner. c. With the trigger housing assembled to the receiver, check functioning of all moving parts at full and semiautomatic settings. d. Check to...

General Repair And Rebuild Methods

The foreman in charge of repair and rebuild will procure a complete set of special tools- The number of units to be processed will determine the disposition of manpower and job procedure, and the extent to which improvised tooling, assembly line methods, and special shop provisions are justifiable. b. Precision tools for inspection of critical dimensions and tolerances will be provided where necessary. c. Use only tools that fit snugly as loose fitting tools may damage part. d. It is the...

Spare Parts

Some parts of your carbine may in time become unserviceable through breakage or wear resulting from continuous use. Extra parts are provided with the carbine to replace those parts most likely to fail. These parts normally will be kept with the organizational property. They should be kept cleaned and lightly oiled to prevent rust. Sets of spare parts should be kept complete at all times. Whenever a spare part is used to replace a defective part in the carbine, the defective part should be...

Accessories

Accessories include the tools required to assemble and clean your carbine, and the gun sling, spare parts containers, covers, arm lockers, and similar articles. They should be used for no other purpose than that for which they are intended. When not in use, they should be stored in the places provided for them. Detailed descriptions or methods for the use of all such accessories are not outlined in this manual. However, some of the most common accessories are described below. a. The brush and...

Section Iv Trigger Housing Group Carbines M And M

DISASSEMBLY FIELD OR DEPOT MAINTENANCE a. To remove the trigger housing group the disconnector lever must first be removed, as the disconnector lever pin locks the housing to the receiver. b. To remove the disconnector lever, move the selector to its rearward position and push the selector spring up the slot in the housing magazine post to the dismounting notch and withdraw, using a drift or the operating slide spring guide. Slide the selector off the disconnector lever pin. The disconnector...

Figure Old and new design hammers for carbines Ml MA M and M

3 Where comparators are not available inspect sears carefully. The nose should have a fine grind surface and should have a small radius at the point where it contacts the sear surface of the hammer. The surface at the extreme rear end should be flat ground and the lower corner or edge should be sharp. Some sears 6200978 have been properly ground at each end and are usable. In this connection reference is made to Fig. 52, which is correct as far as it goes but is not complete. Sears 5653483...

Figure Hand guard assembly

Shock of recoil to be transmitted to the trigger housing retaining pin. This is especially detrimental in the case of the carbines M2 and M3. b Left inside face of stock opposite head of hammer pin. This face may be scored because of an incorrectly assembled hammer pin. c Point on right side of stock and hand guard where operating slide bar passes through to right side of receiver Fig. 95 . d Recess in bed of stock in which operating slide functions Figs. 97 and 106 . e Forward shoulder of...

Figure Adjustable rear sight assembly for Ml MA and M carbines

Peening Lug Ruger

As the adjustable rear sight is replaceable only as an assembly, no replacement spare parts are furnished for field repair. Check machined type sight for loose or missing index plate and screw. The sight should be kept clean and lightly oiled to prevent rusting and insure proper operation. OO. ASSiAMvNG Ayj SUKi AC M lt iH amktv lt gt 11W S M SOttW. A l WiKC. AN ttl i gt rKH lt AMroyiot MtfNvJM i y 1Mb b. Refinishing. To remove corrosion from the rear sight assembly without removing...

Figure Barrel and receiver group M carbine

Carbine Receiver Modification

Bullet ramp where the angular surface intersects the vertical should be smoothly rounded. 6 Inspect receiver for looseness with barrel, deformation, rust and burrs. If receiver is disassembled from barrel, inspect for worn or crossed threads in barrel aperture DEPOT MAINTENANCE ONLY . 7 Inspect bolt guideway and locking shoulders for wear, burrs, cracks, and foreign matter. Inspect receiver retaining lug on rear end Figs. 78 and 104 for wear, burrs, and looseness with recoil plate when...

Ine M

M14 Full Auto Disconnector

Diagonal cut at the point where the shank of the handle joins the body. The latter cut forms a cam for camming down the forward end of the disconnector lever. 5 Stock Fig. 99 . A clearance cut is made in the inner right wall of the M2 carbine to provide clearance for the projecting right side of the disconnector. A cut is also made in the inner left wall for clearance for the selector. The bridge is cut down to the central section for clearance for the disconnector lever. 6 Disconnector group...

Repair And Rebuild Field Or Depot Maintenance

Mossberg 46b Trigger Plunger Install

Replace all broken, worn, or otherwise unserviceable parts. Remove burrs and rust. Weapons must have all applicable modifications, and instructions contained in future technical bulletins must be followed. Note that certain components for carbines M2 and M3 a e not interchangeable with those of the carbines. Ml and M1A1, although some designed for the former can be used on the latter. b. Hammer Fails to Cock. This condition may be due to damaged sear, broken sear spring, burrs or...

Assembly

Replacing Barrel Select proper barrel and receiver combination so that about 1 16-inch draw is obtained when assembled. Screw the receiver on the barrel with receiver and barrel wrench 7113308 draw up receiver until alignment marks on barrel and receiver Fig. 91 coincide. Then determine that the fiat surfaces on bottom of barrel and receiver are parallel. Check this by indicator or placing two bars, about 10 inches long, in position as illustrated in figure 92 and sight over the edges. When...

Figure Viseheld stamping fixture with barrel and receiver assembly in place

Carbine Assembly

Carbine clamped in bench-mounted stamping fixture. 4. Use white filler as prescribed in 1 above to increase legibility. Note. Under no circumstances will the original serial number be obliterated. 5. Upon completion of the stamping operation, assemble the carbine and operate through the complete firing cycle to determine whether the receiver has been deformed. c Bench-mounted stamping fixture. This fixture is especially useful at depot maintenance installations where large quantities...

Figure Bolt and firing pin

Check to assure that only full round bolts 7160092 are used in the carbines M2 and M3 Fig. 58 . Bolt 557148 will be used in carbines Ml and M1A1 in so far as practicable in order to conserve supply of bolt 7160092 for use in the carbines M2 and M3. j. Visually inspect to assure sufficient firing pin protrusion and proper contour of firing pin point. The firing pin protrusion should not be less than 0.048 inch DEPOT MAINTENANCE ONLY. k. Check assembled bolt to insure that, extractor shank...

Figure Stock assembly and hand guard assembly for carbine MA

In the locking nut, and the extension should pivot smoothly about the hinge screw through an arc of approximately 180 degrees to lie flat against the left side of the stock. When the extension is pressed flat to the stock, the lock should slip into the slot in the locking nut and the butt plate should pivot on the bar ends, so that the extension will lie locked close to the stock without looseness or shake. If shake is present in either position, a worn locking lug or locking nut, a loose hinge...

Stoppages

The stoppages that are not cleared by immediate action fall into three classes. 1 Failure to chamber is caused by some condition that prevents the bolt from chambering the cartridge completely. 2 Failure to fire is caused by the primer failing to fire when struck by the firing pin or a failure of the firing pin to strike the primer. 3 Failure to extract is caused by an extremely dirty chamber or ammunition, or by a broken extractor or spring. fc. Table I gives the causes for these and other...

Disassembly Of The Trigger Housing Group Under Supervision Only

To disassemble the trigger housing group a. Squeeze the trigger and ease the hammer forward slowly to the fired position. Grasp the Figure 19. Removing the hammer spring and hammer spring plunger. Figure 16. Replacing the trigger housing group. Figure 18. Assembling the stock group and the barrel and receiver group. Figure 17. Replacing the selector spring. Figure 19. Removing the hammer spring and hammer spring plunger. trigger housing group in the left hand as shown in Figure 19. With the...

Figure Serial numbers on cal carbines

Vice Held Fixture

Reaming chamber for head space. Figure 86. Relocated serial number on cal. .30 carbines. Figure 86. Relocated serial number on cal. .30 carbines. and small patch. Be sure rear end of tube is clean. c. Re finishing of Barrel and Receiver. When necessary to sand or grit blast to remove rust, or otherwise prepare the barrel and receiver for re-finishing, remove the rear sight and front band. If practicable, the front sight should be kept mated with the barrel and receiver assembly from...

Figure Slide bolt extractor and plunger

Carbine Bolt Assembly

Disengaged otherwise, rear bar is bent or guide lugs are excessively worn. c. With operating spring and guide installed, test function of operating slide stop. When bolt is fully retracted and stop pressed into its retaining groove, it should positively hang slide and bolt in that position. If slide does not remain in rearward position, the stop and or retaining groove are worn or stop friction spring is missing, broken, or set. Stop should be cammed out of groove and lie flush with bottom...

Figure Replacing the magazine catch

Carbine Disconnector Specifications

Align the hammer pin holes and replace the hammer pin. The operating slide spring guide may be used to align the hammer pin holes. Squeeze the trigger and move the hammer forward to its fired position. Assemble the hammer spring and hammer spring plunger. Seat the free end of the hammer spring in its well in the trigger housing group with the head of the hammer spring plunger on the right side of the hammer. Insert the operating slide spring guide into the hole...

Figure Rebuild flow chart

Carbine Breakdown Exploded View

Operations Route Sheet for cal. .30 Carbines MI, M1A1, M2, and M3 Remove gas cylinder pistol and nut if necessary Remove front and or rear sight if necessary Inspect stock and hand guard for dents, multilation and cracks Inspect trigger housing and components b. Check to see that new type hammer and spring are used for the carbines M1 and M1A1. c. Check to assure that rotary safety is used on all carbines. d. Check to see that new type magazine catch is used. e. Check to see that...

Differences Between Models

Carbine Ballistics Table

For information on differences between models which affect troop use, refer to page 44. b. Cal. .30 Carbines Ml and M1A1 Figs. 1 and 2 . The only difference between the carbines Ml and M1A1 is the stock. The Ml has a one-piece wooden stock, whereas the M1A1 has a folding metal stock extension and a wooden hand grip. c. Cal. .30 Carbines M2 and M3 Figs. 3 and 3a . The carbine M2 is the same as the Ml except for differences in design of certain components and the addition...