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50 Cards in this Set
- Front
- Back
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Weapon Safety |
-Treat all firearms as loaded at all times. -Never point a weapon at anything you don't intend to shoot. -Positively identify your target and know what is around and behind it. -Finger off the trigger until you are on target and ready to shoot. -Never engage in horseplay. |
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Clearing procedures |
1. Safety to fire 2 Pull cocking handle assembly to rear locking bolt to the rear, and return coming handle forward. 3. Safety lever to Safe 4. Push in latches to open cover assembly. 5. Remove any ammunition if present. 6. Open cover and inspect 4 Safety points. 7 close cover assembly, ensure it locks shut. 8. Place safety to fire. 9. Hold cocking handle to rear, depress trigger, and ride bolt forward to close and lock. |
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Description |
- Air cooled - Belt-fed disintegrating metallic split belt link belt. - Gas Operated. Recoil with gas-assist boost - fixed head space. Allows for quick barrel changes for cooling and maintenance. -fires from the open bolt position. Prevents explosion of cartridge (cook off) after prolonged firing. - 7.62mm NATO - 27.6 LBS - 49 inches overall |
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Roles of the machine gun |
1. Supports rifleman in offensive and defensive mode. 2. Provides heavy volume of close and continuous fire. 3. Can engage targets beyond the capability of rifleman. 4. Marking or locating targets 5. Aerial defender when necessary. |
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Range |
Maximum adjustable 1800 meters Maximum 3,725 meters Maximum effective -- point:800 meters w/ M122A1 tripod -- area target: 1800 meters w/ M122A1 tripod. Teacher burn out: 900 meters |
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Sustained rates of fire |
-100 RPM (6-9 round burst w/ 4-5 seconds between bursts) - barrel change every 10 minutes |
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Rapid rate of fire |
-200 RPM (6-9 round burst w/ 2-3 second between bursts. - barrel change every 2 minutes |
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Cyclic rate of fire |
- 650 rpm - barrel change every minute |
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Types of Ammunition
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Ball Tracer Blank Dummy |
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Ball
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-Copper gilded projetile -Plain tip -Used on personnel and light material targets |
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Tracer
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-Copper gilded projectile -Orange or red painted tip Used for: -Observation of Fire -Short range incedinary effect -Signanling |
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Blank
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No projectile; used for simulated live fire (training with BFA only)
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Dummy
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No primer or powder; solid black; case is corrugated or has three holes. |
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Bulk issue package
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1,500 rnds can
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Bandoleer package
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100 rnds, 200 rndds per can |
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Major Components
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1. Barrel Assembly 2. Buttstock and Buffer Assembly 3. Driving Spring Rod Assembly 4. Bolt and operating rod assembly 5. Trigger housing assembly 6. Cover assembly 7. Feed Tray 8. Receiver assembly |
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Barrel assemb;y
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houses cartidge for firing and directs projectile
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Buttstock and Buffer assembly
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absorbs recoil for bolt and operating rod assembly at the end of recoil movement.
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Driving spring Rod Assembly
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provides energy for returning bolt and operating rod assembly to firing position
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Bolt and operating rod assembly
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provides feeding, stripping, chambering, firing, extraction, and ejetion of catridges using the projectile propelling gases for power.
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Trigger housing assembly
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controls the firing of the machine gun
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Cover assemblly
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feeds linked belt and holds cartridges in position for stripping, feeding and chambering the cover assembly for the M240B has an optical sight rail. |
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Feed Tray
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serves as a guid for positioning catridges to assist in chambering.
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Receiver assembly
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serves as a support for all major components houses action of weapon and, through a series of cam ways, controls functioning of the weapon.
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Barrel Assembly
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1. Flash Suppressor 2. Fron Sight Assembly 3. Barrel Carrying Handle Assembly 4. Gas Regulator Plug 5. Gas Collar 6. Heat Shield 7. Barrel |
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Buttstock and Buffer Assembly
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1. Buttstock Assembly 2. Butt plate 3. Buffer Catch |
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Trigger Housing Assembly
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1. Trigger Assembly 2. Safety 3. Left and Right Grip |
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Cover Assembly
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1. Cover 2. Accessory Mounting Rail |
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Receiver Assembly
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1. Forward accessory rail 2. Handguard 2. Ejection Port cover 4. Link Ejection Port 5. Cocking handle Assembly 6. Barrel Locking Latch 7. Rear sigh assembly |
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Disassembly 1-4 |
1. Clear weapon 2. Depress barrel locking latch and hold 3. Turn barrel releas/carrying handle to upright position. **Be sure bolt is forward or receiver can be damaged** 4. Remove barrel Push forward and life barrel out. |
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Disassembly 5 |
5.Remove heat shield assembly for barrel Lift rear of heat shield assembly off barrel then pry front tabs out of holes on gas hole bushing. 6. |
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Dissassemby 6-9 |
6. Pull trigger housing assembly down and back 7. Depress cover latches and raise cover assembly Pull cocking handle assembly back, then pull bot and op rod assembly out. 8. Close cover Push out spring pin as far as possible with the back of buffer Then remove pin w/fingers. Depress cover latches, lift upwards and remove cover assembly. Remove feed try. 9. Extend bipod legs to down and locked position. |
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General Inspection
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1. Check for broken, missing, or worn parts 2. Check for cleanliness, lubrication, and spring tension. |
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inpection of buttstock and buffer assembly
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1. Inspect buttstock for cracks 2. Check to make sure back plate latch lockes buttstock securetly to receiver assembly when installed. |
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Inspection of Hydraulic Buffer assembly
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1. Check for burrs or rough edges on mating grooves and flanges 2. Ensure back plate latch locks buffer assembly securely to receiver assembly when installed. 3. Check buffer for leaks 4. Check buffer for looseness in backplate. |
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Inspection of Driving Spring Rod Assembly
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1. Check spring for broken stands 2. Replace spring rod assembly if two stands are broken on the same coil or three or more strands are broken, regardless of location on the same spring. 3. Make sure driving spring rod assembly is not bent. |
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Inspection of Bolt and Operating Rod Assembly
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1. Check firing pin to make sure it is straight and has a smooth, round tip 2. Make sure ball end is installed between spring and bottom of groove |
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Inspection of Trigger Housing Assembly
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1. Inspect the tripping lever and sear for burrs on edges or shoulders 2. Push back on tripping lever to raise sear 3. Place safety to safe, pull trigger, sear should not drop down far enough to lock in the downward position. 4. Place safety to fire, pull trigger, sear should drop down and lock in the downward position. 5. Check for cracked grips 6. Check sear spring to make sure the leg of the sear spring is behind trigger and the pin. 7. Check grip assembly for loose or missing grip screws 8. Check trigger guard for bends or cracks. |
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Inspection of Cover assembly
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1. Pivot feed lever back and forth to make sure the feed mechanism operates smoothly w/o binding. 2. Push in on cover latches 3. Push down on catridge guides and feed pawls to make sure spring tension 4. Inspect accessory mounting rail for nick or burrs |
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Inspection of Feed Tray
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1. Check feed tray for cracks, deformation, broken welds, and dloose rivets 2. check for chips and burrs on tray face |
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Inpection of forward accessory rail
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check for cracks, broken or missing parts
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Inspection of bipod assembly
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check bipod legs for cracks, twisted, or incomplete assembly
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Inspection of Barrel Assembly
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1. Check for bulges, bends, burrs, and obstructions or pits in chmber or bore. 2. make sure flash suppressor is fastened securely. 3. Ensure barrels are properly tagges as a set. 4. Inspect front sight for looseness or any damage. 5. Inspect carrying hancle assembly for ben, broken or missing parts 6. Ensure heatshield is present, remains retained on barrel assembly and is not bent, broken, or missing parts. |
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Inspection of Receiver Assembly
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1. check that rear sigt assembly is securely mounted to receiver assmbley and operates properly. 2. Check that cocking handle operates slide properly 3. Check fo damaged or missing ejection port cover, spring and pin 4. Check for damage to interrupted threads in receiver |
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Installing barrel
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Push barrel release control handle firmly to the right and count the clicks. Fewer than 2 or more than 7 clicks indicate defective parts |
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Cleaning
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1. Diassemble and clean all metal components and surfaces that have been exposed to poder fouling. 2. Use only solvvents authorized by technical orders such as RBS and Dry cleaning solvent. 3. Do not use dry cleaning solvent on backplate assembly. |
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Lubrication
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1. Use only lubricants authorized by TO such as CLP, LSA, and LAW 2. Use CLP and LSA when temp are above -10 and LAW when below -10 3. Ensure bore is clear of lubrication before firing. |
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Function Check (cleared weapon)
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1. Place the safety to Fire 2. Pull cocking handle to the rear, locking the bolt to the rear, and return cocking handle forward. Check SAFE Check FIRE |
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Immediate Action
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1. Pull cocking handle to rear, locking the bolt to the rear. 2. Observe ejecion port to see if cartridge case, or round is ejected. 3. If cartridge case or round is ejected, return cocking handle forward. 4. Attempt to fire. 5. if gun does not fire, pull cocking handle rearward to lock bolt assembly back. Return cocking handle forward and place on Safe. 6. Hot or Cold/Training or Combat enviorment. |
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Remedial Action
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1. Clear weapon 2. visually inpect the wpn 3. Load and attempt to fire. |
