B Individual Served Weapon Sight

The AN PVS-4 is the currently fielded Figure 3-47. AN PVS-7B, NVG. night sight used with various weapons, including the medium machine gun. There is no mount to attach the AN PVS-4 to the gun however, the AN PVS-4 can be hand-held and would serve more as a monocular night vision device than as a sight in this configuration. The AN PVS-4 can be used in this manner by the machine gun squad leader and or the team leader. The AN PVS-4 could also be mounted on the squad leader's or team...

Wide Targets

When a pair of guns engage frontal targets which are 100 mils or less in Figure 6-13. Traversing Method, Using a Squad of Guns, Both Flanks Visible to the Gunners. width for the heavy gun and 50 mils or less in width for the medium gun, and are also less than the length of the beaten zone in depth, the normal traversing method is used. Each gun delivers the initial Figure 6-14. Traversing Method, Using a Squad of Guns. Target for Heavy Machine Gun More than 100 Mils in...

Employment Considerations

To be most effective, a machine gun should be employed from a tripod mount on the ground, using a traversing and elevating (T& E) mechanism. While a machine gun may be employed from a vehicle mount while on the move, this lessens the accuracy of fire and generally decreases the survivability of the vehicle and personnel. When the gun must be employed from a vehicle, the leader seeks a firing position that provides the greatest possible degree of cover for the vehicle and crew. Crews should...

Detailed Disassembly and Assembly

The term detailed disassembly, as it is used in this manual, refers only to those disassembly procedures authorized for the operator level. This is not to be confused with procedures authorized for 2d echelon maintenance (unit armorers) or above. Detailed disassembly of any of the groups beyond that described in this document is NOT AUTHORIZED except by qualified ordnance personnel. The operator is not authorized to detail disassemble the trigger group or the buttstock and buffer group. The...

Cleaning Materials and Lubricants

The only authorized cleaning materials for use at the unit level are CLP, RBC, and dry cleaning solvent. Use CLP or bore cleaner for daily maintenance and to remove minor carbon buildup after firing. Dry cleaning solvent will dry out the metal and it is recommended for cleaning during change from one lubricant to another. b. Lubricants. The lubricants authorized for field use on the M240G are CLP, LAW, LSA, and LSA-T. They are used to lubricate certain operating parts...

Orientation

A dot is drawn to signify the position of the gun. In order that higher headquarters can determine where the gun is located on the ground, the sketch is oriented (see figures 6-39 and 6-40). The gun position can be positively located by an 8-digit grid coordinate. Finally, the range card is signed by writing down the gun number, unit designation, and date. For security reasons, no higher unit designation than the company is shown. A separate range card is made for an alternate position. The...

Transition Firing

Transition firing provides the automatic rifleman the experience necessary to progress from the 10-meter firing to field firing at various types of targets at longer distances. The automatic rifleman experiences and learns the characteristics of fire, field zeroing, and range determination. He uses the adjusted aiming point method of fire adjustment. Transition firing should take place on available field firing ranges. These firing exercises are conducted from the bipod...

Miscellaneous

Berry, Henry, Hey Mac, Where Ya Been Living Memories of the U.S. Marines in the Korean War, St. Martin's Press, New York, 1988 Heinl, Robert Debs, Jr., Victory at High Tide The Inchon-Seoul Campagin, J.B. Lippincott Company, Philadelphia and New York, 1968 Shaw, Henry I., First Offensive The Marine Campaign for Guadalcanal, Marines in World War II Commemorative Series, Marine Corps Historical Center, Washington D.C., 1992 Clean gas regulator, piston, and cylinder. Failure to cock or a runaway...

Recording Information

As the firing data is obtained, using any combination of the methods previously described, it is recorded on the range card. Particular attention is paid to the final protective fires, either the FPL or the PDF, whichever is assigned. This is the single most important piece of information of concern to superiors. Figure 6-39 shows a range card with an FPL and firing data recorded using the T& E method only. Figure 6-40 depicts a range card with a PDF and data recorded using a combination of...

Gunners and Leaders Rule

Moving directly away, place the front sight post above center of mass. For targets moving directly at you, align the front sight post below center of mass. For all other targets, align the front sight post with center base of the target with the appropriate lead. (3) Breath control. There are no changes except that you must hold your breath quickly because of the fleeting nature of moving targets. (4) Trigger control. There is no change in the application of this fundamental.

Chain of Fire Control

The chain of fire control follows the chain of command. Fire control of the machine gun fire unit is executed by the section and squad leaders. a. Weapons Platoon Leader. Usually the platoon leaders give their instructions orally and directly to the section leaders. These orders assign a mission to the section (or squad), or give the firing position area the section (or squad) occupies and the targets it engages, or the sector of fire it covers, and the exact location of friendly troops that...

Methods of Range Determination

There are many methods for determining range. Some of these are estimating by eye, firing the gun, measuring range from a map or aerial photograph, stepping off the distance, or securing the information from other units. Ranges are determined to the nearest 100 meters for machine gun firing. In combat, the most commonly used methods are estimating by eye and observed fire. a. Estimating by Eye. Estimating by eye is the method most often used in the field. First, it is important to realize...

Normal Maintenance Procedures

Each gun should be cleaned as soon after firing as possible and each time it is exposed to field conditions. In combat conditions the gun should be cleaned and lubricated daily, whether or not it has been fired. If possible, keep the gun covered with a canvas, tarpaulin, or poncho when not in use. During normal training conditions, inspect the gun daily for rust and maintain a light coat of CLP on all metal parts. In ideal conditions, when the gun is not used and is kept in a clean place, it...

Figure Cleaning the Grooves of the Piston

Use the special tool (scraper). Remove all carbon dust. Do not use CLP on the collar, gas block, or body. Clean the gas vent hole. See figure 2-35. Clean the central hole with the appropriate part of the scraper by turning it clockwise and pushing it inward toward the bottom of the housing. See figure 2-36. Use the protruding tips of the scraper to clean the two grooves of the body. See figure 2-37. (3) Gas cylinder and piston. Use the special tool (scraper). Do not use CLP...

Figure View Through Binocular Use of Auxiliary Aiming Point

After the direction and elevation has been determined, record it on the range card for future use. When firing, the guns are allowed 2 mils of traverse in each direction (see figure 6-30). After firing the first burst, traverse 2 mils in one direction and fire, then 4 mils in the other direction (firing a burst after each 2 mil change) thus, bursts are fired 2 mils to the right and left of center. Normally, searching fire will not be necessary because of the length of the beaten zone, unless...

Distribution of Fire

Fire, to be effective, is distributed over the entire target. Improper distribution results in gaps between beaten zones and allows a part of the enemy to escape or to use his weapons without effective opposition. a. Factors Affecting Distribution. There is no fixed rule as to the maximum width of a target that may profitably be engaged by a single machine gun, although it is preferable that targets be 100 mils or less in width in the case of the heavy gun on the tripod, and 50 mils or less in...

Plotting Board Used as an Observed Firing Chart

The plotting board is used as an observed firing chart on which the locations of the registration points are plotted in relation to the firing position from data obtained by registration firing (fire adjustment). The pivot point of the plotting board is arbitrarily selected as the location of the base machine gun (usually left flank gun) in the firing position. The registration data (GUN-TGT range and corrected magnetic azimuth) determined by adjusting on the registration point are then used to...

Night Vision Sight ANTVS

The AN TVS-5 is a portable, battery-operated electro-optical instrument used for passive night observation and fire. It amplifies natural light such as moonlight, starlight, and skyglow. The sight does not emit visible infrared light that can be detected by the enemy. The AN TVS-5 may also be used with the MK19. For more on the AN TVS-5, see TM 11-5855-214-10. a. Installation. To install the AN TVS-5 Release the catch at the left side of the cartridge cover and raise the cover to the UP...

General Data

Tripod complete) 45.6 pounds Weight of machine gun 25.6 pounds Weight of barrel 6.6 pounds Weight of spare barrel case, complete with spare barrel and all SL-3 components 12.90 pounds Weight of tripod, complete with flex-mount including T& E mechanism 20 pounds Length of machine gun 49 inches Height of machine gun on tripod 17 inches Muzzle velocity 2,800 feet per second Rifling Four grooves with a uniform right hand twist, one turn in 12 inches Maximum 3,725 meters Maximum effective 1,800...

Tungsten Penetrator In An Amber Tinted Sabot

Tip is aluminum or tip is painted blue with an aluminum ring. Armor-Piercing Incendiary Tracer (M20) Tip is painted red with an aluminum ring. Saboted Light Armor Penetrator (M903) Round is a Tungsten penetrator in an amber-tinted sabot. Saboted Light Armor Penetrator-Tracer (M962) Round is a Tungsten penetrator in a redtinted sabot. Blue plastic bullet with red tip and plastic case. Three holes are drilled in the cartridge case and there is no primer.

Placing the Gun into Action

To place the gun in action, the squad leader gives the command gun to be mounted here, front, action. The team leader rises to his feet, grasps the right leg of the tripod near the tripod head with his right hand, and grasps the ammunition box with his left hand. He rotates the tripod onto his right hip, left leg up, and moves forward to the gun position. See figure 3-66. On arrival at the gun position, the team leader places his ammunition to his front so that it will be approximately on line...

Classes of Fire with Respect to the

Fire delivered on a point target. Little or no manipulation is required. After the initial burst the gunner will follow any change or movement of the target without command. See figure 6-10. b. Traversing Fire. Fire distributed against a wide target requiring successive changes in the direction of the gun. When engaging a wide target requiring traversing fire, the gunner should select successive aiming points throughout the target area. These aiming points should be close enough...

Principles of Machine Gun Employment

Maximum efficiency in the tactical employment of all types of machine guns can be reached by applying the following principles during planning. Most tactical situations would benefit from the employment of all eight principles simultaneously. However, in actuality, these principles are prioritized according to the tactical situation and some may be abandoned in favor of others that are more crucial. These principles are not meant to serve as absolutes. They are, however, sound ideas, proven in...

Figure Traversing Bar and TE Mechanism TE Reading of L

When the left edge of the traversing slide is on a graduation to the left of 0 graduation on the traversing bar, the direction reading is recorded as LEFT that number of mils (the muzzle of the weapon moves to the left). After taking a direction reading of a linear target, the width of the target is measured in mils by traversing across the target using the traversing handwheel. The traversing mechanism must be repositioned before moving to another target. c. Elevation Readings. After obtaining...

Fire Commands

Fire commands are the means by which fire control is exercised. Fire commands are the instructions issued to the gun crews that enable them to properly engage the desired targets. There are two types of fire commands-initial and subsequent. Initial fire commands are issued to engage targets and to shift fire to new targets. Subsequent fire commands are issued to adjust fire, change the rate of fire, and cease fire. The following explanation is based on employment of the guns by squad (two...

Figure Combination Front Sight Adjusting Tool

The machine gun is manipulated until the line of aim intersects the target at its center base. b. Adjustment of Fire. Adjustment of fire is another fundamental of good marksmanship. The team leader and the gunner observe the strike of the bullets when the initial burst is being fired. If it is not on target, the gun is manipulated until the bullets hit the target. c. Mechanical Skill in Manipulation. Mechanical skill in manipulation is required to engage targets that have depth or width. Skill...

Ballistic Data

Figure 3-53 shows the armor penetration capability and other ballistic data for the M80 ball round and the M61 armor piercing round. Also see appendix A for further ballistic data. d. Dummy Cartridge. Used during training, such as gun a drill. It is completely inert, but simulates service ammunition for practice in loading the gun. e. Armor-Piercing Cartridge. Used against lightly armored targets where armor-piercing effects Figure 3-52. Ammunition for the M240G.

Figure Installing the Blank Firing Adapter

Qualification utilizes the same strings of fire outlined above in practice firing, with the additional requirement to zero the weapon. There are a total of 156 rounds fired in the 12.7 points . A bullet hole on the line between two squares may be counted in either square, but not in both squares. It should be scored in the square which will give the higher score. Pasters 1 through 4 may receive a total of 24 points 4 scoring squares with a total possible point value of...

Walking the FPL

Once the machine gun unit leader has ensured that positions are occupied properly, machine guns are immediately set in firing positions to cover assigned sectors of fire and principal direction of fire PDF or FPLs. The squad leader points out definitive terrain features to each machine gun team when prescribing sectors of fire, PDFs and FPLs. When a FPL is assigned, it should be walked whenever practicable. Walking the FPL allows the team to Figure G-6. Dead Space in FPL. position behind the...

B During Extreme Combat Situations

Press charger handle locks and rotate charger handles down. Pull and lock the bolt to the rear. Push the charger handles forward and up to their locked position. Relay the gun on target and attempt to fire. c. Subsequent Action. Two potentially serious stoppages may occur with the MK-19 that require different procedures from those described above. 1 Bore Obstruction. This means that part of the previous round may be lodged in the barrel and could possibly prevent the next warhead from passing...

Fundamentals

Essential Factors of Indirect Laying. Four essential factors must be considered in indirect laying. These are direction, elevation, mask clearance, and troop safety. b. TOG Method. The observer occupies an observation post OP from which he can see the gun position if possible , the mask, friendly troops if present, and the targets. The observer draws a diagram to scale of these various positions in relation to the OP, using a compass to determine their magnetic azimuths and a map to...

A Traversing and Elevating Mechanism

The traversing mechanism consists of a traversing bar, slide, and screw assembly. The traversing bar, graduated in 5-mil increments and fits between the trail legs of the tripod. The traversing slide and screw assembly are clamped in place on the traversing bar by the traversing slide lock lever. When the traversing slide is locked to the traversing bar, the traversing hand-wheel should be centered. The traversing slide is properly mounted when the lock lever is to the...

Beaten Zone

The beaten zone is the area on the ground upon which the cone of fire falls. a. Effect of Slope of Ground. When the cone of fire falls on level ground which is at the same height as the gun, the lengths of the beaten zone are as shown in figure 6-3. The maximum length is obtained when the slope of the ground approximates the angle of fall of the bursts. On rising ground, the length of the pattern is shortened. The minimum length occurs where the slope of the ground is perpendicular to the cone...

EPositioned to Produce Enfilade Fire To

Achieve the greatest effect from the machine gun, position it so that the long axis of the beaten zone coincides with the long axis of the target. This type of fire, called enfilade fire, causes the maximum amount of rounds to be concentrated on the maximum amount of targets, significantly increasing the chances of hitting targets. Enfilade fire is normally associated with flanking fire. f. Interlocking Fire. Ensuring that fire from one machine gun position interlocks with the fires of other...

Note

Overhead fire is not delivered when the gun is mounted on the bipod, unless the vertical interval of the troops below the gun target line is such as to make safety obvious. The center of the cone of fire must clear the heads of the friendly troops by a prescribed distance. See figure 6-22. This distance, known as minimum clearance, is found by adding together the following elements The height of a man, standing, taken as 1.8 meters. Half the vertical dimension of the 100 percent cone of fire at...

The Mil A Unit of Angular Measure

The machine gunner bases much of his work on the measurement and application of angles. The width of a target, for example, is measured by constructing an angle which has imaginary lines from the flanks of the target to the gunner's position observer's position . Angles can be measured in degrees, mils, and other units. In most cases, the mil is used for calculating firing data. The mil is a subdivision of a complete circle. There are 6,400 mils in a circle or approximately 17.8 mils in 1...

Types

High explosive HE projectiles are used for fragmentation effect against light materials and fortifications and personnel. There are two types of HE rounds M383 DODAC 1310-B571 and M384 DODAC 1310-B470 . Their fillers and body materials differ, although performance traits are the same. The casings are olive drab with a yellow ogive and yellow markings. b. High Explosive Dual Purpose. High explosive dual purpose HEDP ammunition has a high explosive projectile with an internally...

Classes of Fire with Respect to the Ground

Fire approximately parallel to the ground where the center of the cone of fire does not rise above 1 meter. When firing over level or uniformly sloping terrain, the maximum extent of grazing fire obtainable for the M240G is approximately 580 meters. This figure is rounded to 600 meters to simplify calculations in tactical planning and to accommodate the rear sights of the M240G which are graduated in 100 meter increments. The maximum extent of grazing fire obtainable for the M2...

Manipulation Exercises

Manipulation is the process of shifting the direction of the gun from one definite point to another definite point. After the gunner understands the principles of sighting and aiming, and can assume a satisfactory firing position, he is given instruction in manipulating the gun to obtain an accurate initial lay, then to shift the direction of the gun to successive points with proficiency. a. Manipulation Exercise. The coach ensures that the following instructions are understood and followed 1 A...

Laying the Gun for a Principal Direction of Fire

To engage a PDF, you are allowed to traverse and search over the entire dangerous avenue of approach, so the PDF is generally in the center of the sector. Lay the gun on the near end of the PDF and take the direction reading. Laying for elevation is accomplished by firing the PDF and adjusting the center of impact onto the near end of the avenue of approach. The gun is then fired employing traverse and search to cover the entire target. The number of mils of traverse and search necessary to...

Figure Windage and Elevation Peep Sight Correction Chart

Zeroing aligns the sights with the barrel so that the point of aim equals the point of impact. Ten-meter zeroing is for conducting 10-meter fire only and has no further application. Zeroing at range or field zeroing is the automatic rifleman's battlesight zero and must be recorded. 1 10-meter zeroing, set the sights mechanical zero . The automatic rifleman indexes or places the elevation knob on a range of 700 meters. He centers the rear peep sight by rotating it clockwise right as...

US Marine Corps

PCN 143 000014 00 MCWP 3-15.1 Machine Guns and Machine Gun Gunnery DEPARTMENT OF THE NAVY Headquarters United States Marine Corps Washington, D.C. 20380-0001 Marine Corps Warfighting Publication MCWP 3-15.1, Machine Guns and Machine Gun Gunnery, describes how various machine guns are maintained and employed by the U.S. Marine Corps' machine gun crews. It also provides the principles and techniques for their use in engaging and destroying enemy targets. This reference publication is designed for...

Figure Ruptured Cartridge Case Extractor

Only the first round should be fired with the parts fully forward. The gun fires automatically as long as the trigger and bolt latch are held down, and ammunition is fed into the gun. During the recoil of 1 1 8 inches, the barrel buffer spring is compressed by the barrel extension shank since the notch on the shank is engaged in the cross groove in the piston rod head. The spring is locked in the compressed position by the claws of the accelerator, which engage...

Figure MG Gunners and Leaders Rule Data

The gunner's and leader's rules allow the determination of the safety limit by setting the safety angle on the gun and looking across the gun's sights. The safety limit is determined by the intersection of the new line of aim and the ground. When the feet of the friendly troops reach this point the fire must be lifted or shifted. 1 Gunner's rule. The gunner's rule is used to determine the safety limit when the range to the target is 850 meters or less and friendly troops are at least 350 meters...

Figure Cutaway View

The M240G is designed for easy disassembly and assembly the use of force is not necessary. No special tools are required. As the weapon is disassembled, place the parts in the order in which they are removed on a clean, flat surface. This reduces the possibility of losing a part and aids in assembly, as all parts are replaced in reverse order. To prevent unnecessary wear, disassembly should be kept to a minimum, consistent with maintenance and training requirements. See figure 3-4. Disassembly...

Classes of Fire with Respect to the Target

The long axis of the beaten zone is at a right angle to the long axis of the target. See figure 6-9. b. Flanking Fire. Delivered against the flank of a target. See figure 6-9. c. Oblique Fire. The long axis of the beaten zone is at an angle, but not a right angle, to the long axis of the target. See figure 6-9. d. Enfilade Fire. The long axis of the beaten zone coincides or nearly coincides with the long axis of the target. This class of fire is either frontal or flanking and...

Figure Single EType and Double EType Silhouette Targets

Acquires the proper sight picture and give an UP to safety personnel. Engage pasters 1 through 4 in 20 seconds, firing a three-round burst at each paster. The order to mask is given by stating gas. Once the shooters are masked the fire command is given. When the following fire command is given, repeat each element of as it is given. pasters seven through eight seven hundred traverse and search, three-round bursts at my command Acquire the proper sight picture and give an UP to safety...

Army Michen Guns

The gun bag is used to carry and protect the M240G machine gun system, complete. It consists of a large outer bag and a smaller, removable spare barrel bag inside. The complete gun bag is used to carry the machine gun, tripod, flex-mount, spare barrel, and all user maintenance equipment and other accessories SL-3 components see figure 3-45 . This will keep the gun and all its components together and protected during events such as unit movements for embarkation on ships or aircraft. The...

Machine Gun Employment

Properly employed, the machine gun provides a high volume of accurate fire in support of the infantry in both the offense and defense. In the offense, the machine gun can add firepower to the assault, but it is often best employed to suppress or neutralize the objective from a base of fire. The long-range, close defensive, and final protective fires of the machine gun provide an integral part of the defense against infantry attack. HMGs may also be used to destroy lightly armored vehicles or as...

B Barrel Buffer Body Group See figure

Turn the barrel buffer body group upside down. Pry up on the barrel buffer tube lock latch to disengage the latch before moving the lock body to the rear. Pry up the latch end of the assembly, so that the lug will clear the barrel buffer body. At the same time, press down on the front of the lock body to keep it from springing out. Turn the accelerator back to push the barrel buffer tube assembly out of its slot. b Barrel Buffer Body Spring Lock. In most...

Figure Barrel Buffer Body Group Exploded View

Visible through the 3 8-inch hole in the right side plate. Place the smallest loop of a caliber .50 link, or suitable spacer, between the trunnion block and the barrel extension. Screw the barrel all the way into the barrel extension then unscrew the barrel two notches. Remove the link and close the cover. This completes general assembly. h. Function Check. To check for correct assembly, the gunner ensures that the bolt is forward and the cover is closed. With the bolt latch release lock...

Range Determination and Windage Corrections

Range determination is the process of determining distance between two points. There are two methods of estimating range by eye mental unit of measure yardstick and the appearance of objects. The gunner needs training and practice in both methods over varied terrain and under varied conditions of light and weather. A definite system of range determination, frequently practiced, is the only way to make estimation by eye reliable. For information on range estimation by eye, see section IV,...

Figure Spare Barrel

This would enable the gunner to detect, identify, and adjust his own fire onto targets. The AN PVS-7Bs are lightweight 1.5 lbs. , small, and easy to carry and use. This is important when considering the load already carried by machine gun teams. The AN PVS-7B NVG can be hand-held or worn with a head mount. This is important if issued to the gunners because gunners need both hands free to operate the weapon and manipulate the T amp E. The AN PVS-7Bs have a range of 250 meters in...

Vehicle Mounts

The MK-19 mounts on the M4 pedestal mount, the M66 ring mount, and the HMMWV weapons station. 1 Pedestal mount, M4. This is designated for installation on M151 series vehicles e.g., the fast attack vehicle see figure 5-37, page 5-27 . The mount is composed of a pintle socket, pintle clamping screw, column, and braces. See TM 9-1005-245-14 for information on the pedestal. For information on mounting the MK-19, see TM 9-1010-231-13 amp P. 2 M66 ring mount. This mount is designed for...

Figure

Tip is aluminum, or tip is painted blue with an aluminum ring. Armor-Piercing-Incendiary-Tracer M20 Tip is painted red with an aluminum ring. Saboted Light Armor Penetrator M903 Round is a tungsten penetrator in an amber tinted sabot. Saboted Light Armor Penetrator-Tracer M962 Round is a tungsten penetrator in a red tinted sabot. Blue plastic bullet with red tip and plastic case. 3 holes are drilled in the cartridge case. There is no primer.

Sight Settings and BZO Procedures

This paragraph provides information on how to set the sights for elevation and windage for the SAW. It also includes information on how to make corrections if the initial setting on the windage knob or peep sight is not accurate. At a 10-meter target, each paster is 1 cm. Therefore, two clicks on the windage knob in either direction moves the strike of the round left or right 1 cm and two turns on the peep sight moves the strike of the round up or down 1 cm. For example If the shot group was 2...

Technical Manuals TMs

08521A-10 1A Machine Gun 40mm MK19 MOD 3 08670A-10 1A M240 Machine Gun 7.62 mm with change 1-3 08670B-23 amp P 2 M240G Machine Gun 7.62mm 1005-01-359-2714 Supplement _1 08686A-13 amp P 1 Machine Gun Mount MK64 9-1005-201-10 Operator's Manual for Machine Gun, 5.56MM, M249 W Equipment NSN 1005-01-127-7510 EIC 4BG TM-08671A-10 1 9-1005-213-10 Operator's Manual for Machine Guns, Caliber .50 Browning, M2, Heavy Barrel Flexible, W E NSN 1005-00-322-9715 EIC 4AG M48 Turret Type 1005-00-957-3893 EIC...