(C) Depress cover latches, lift upwards and remove cover assembly. Insert the pin (6) through the fork assembly and the T&E and secure with "C" clamps (7) (Figure 3-30). Replace operating rod spring. a. Uncontrolled Fire (Runaway Gun). Align the mounting holes (5) in the trigger housing with the hole in the fork assembly (4). Inspect the butt stock for cracks. Care of the Ammunition Adapter. f. Close the feed tray and cover assembly and place the safety to the fire "F" position. b. (4) Applies immediate action when stoppages occur. 900 metersone full turn moves strike 72 cm (28.35 inches). During training or range firing the M240B should be cleared, disassemble and cleaned immediately. This brings the blade to about the center. The order in which they occur depends on the type of action which the gun employs (lever, bolt, pump, break-open, revolver etc…). table of Contents Be sure to clear weapon before disassembling, cleaning, inspecting. Excessive pressure from the heat may cause premature detonation. This section discusses the operation of the M240B machine gun. g. Pulls the cocking handle to the rear, pulls the trigger, and rides the bolt forward. If the stoppage occurs with a hot weapon (200 rounds or more in 2 minutes or as noted above for training), the gunner moves the safety to SAFE, waits 5 seconds (during training, lets the weapon cool for 15 minutes), uses the same procedures as outlined for cold weapon procedures. a. Sights. This section identifies some of the problems that cause the weapon to perform improperly. The T&E should be centered now (Figure 3-30). (8) Cocking. The tripod is recommended for marksmanship training and defensive employment. Remove the Buttstock and Buffer Assembly. Pull the trigger to allow the sear to drop and the group to slide all the way into the receiver (Figure 3-26). Unlock the front-sight retaining strap and rotate it up. a. (A) Make sure that the barrel-carrying handle is to the right side. Immediate action is action taken to reduce a stoppage without looking for the cause. The operating rod piston should have a slight movement from left to right (about 1/8-inch turn). f. After removal of the barrel, the assistant gunner will remove the gas regulator collar and gas regulator plug from the spare barrel. This should put the base of the blade past the base of the protector. (1) Ammunition must be protected from mud, dirt, and moisture. The details of the cycle of functioning follows: (1) Feeding. 300 metersone full turn moves strike 24 cm (9.45 inches). var setNptTechAdblockerCookie = function(adblocker) { (c) Swab out the chamber several times using a cleaning rod and a dry swab. (B) Grasp the barrel carrying handle and rotate the carrying handle to the upright position (without pulling up on the barrel release). Chart and Diagram Slides for PowerPoint - Beautifully designed chart and diagram s for PowerPoint with visually stunning graphics and animation effects. If you see rust on a weapon, the PMCS should be done immediately. Check trigger spring pin for bends, and or broken or missing spring. He places the first round of the belt in the feed tray groove, double link leading, with open side of links face down. Once the barrel is secured to the receiver the assistant gunner secures the gas regulator collar on the gas regulator plug. Trained gun crews are the only personnel authorized to load the M240B and only when command directs the crew to do so. Sluggish operation and uncontrolled fire are the most common malfunction. script.setAttribute("onerror", "setNptTechAdblockerCookie(true);"); MOVE THE SAFETY TO "S," WHICH PLACES THE WEAPON ON "S." KEEP THE WEAPON POINTED DOWNRANGE AND KEEP AWAY FROM THE WEAPON FOR 15 MINUTES, THEN CLEAR THE WEAPON. The final forward movement of the piston extension drives the firing pin through the bolt assembly onto the cartridge primer and fires the round. Figure 3-17. He ensures the bolt is forward before disassembly, and he places each part on a clean, flat surface such as a table or mat. (3) After using the adapter, inspect to ensure it is still operational. Stuck barrel is the result of the machine gun crew not properly cleaning the gas cylinder and gas regulator plug. The gunner inspects each area of the weapon and related equipment for the conditions indicated. Advantages. (a) Clean each gas inlet hole of the gas regulator plug. Defective extractor plunger. Push the entire bolt and operating rod assembly into the receiver as far forward as possible. The actuating roller moves the feed lever side to side, which in turn moves the feed pawls. If weapon does not function properly and the cause cannot be determined using troubling shooting procedures, notify direct-support maintenance. Insert the bolt and operating rod into the rear of the receiver (bolt upward, operating rod beneath bolt) ensuring the bolt is on top of the rails located on the left and right inner walls of the receiver. Associated tasks essential to maintenance (clearing, general disassembly and assembly, and function checks) are provided in detail. The components of the M240B machine gun and their purpose are shown in Table 3-2 and Figure 3-2. The gunner must always assume the M240B is loaded. A hot barrel may cause the round to cook off. b. (1) Number 1 blade (low 9.8mm). The gunner removes the ammunition from the feed tray only, then closes the cover and attempts to fire. (c) The traversing slide-lock-lever allows rapid lateral adjustments along the traversing bar. 3-9. Lubricate as required. Replacement of the barrel assembly. Push down on the cartridge guides and feed pawls to make sure the springs are not weak or missing. 100 metersone full turn moves strike 10.8 cm (4.25 inches), 200 metersone full turn moves strike 21.6 cm (8.5 inches), 300 metersone full turn moves strike 32.4 cm (12.75 inches), 400 metersone full turn moves strike 43.2 cm (17 inches), 500 metersone full turn moves strike 54 cm (21.25 inches), 600 metersone full turn moves strike 64.8 cm (25.5 inches), 700 metersone full turn moves strike 75.6 cm (29.75 inches), 800 metersone full turn moves strike 86.4 cm (34 inches), 900 metersone full turn moves strike 97.2 cm (38.25 inches). However, these firearms are designed with a “decocker.” When engaged, the “decocker” obstructs or locks the firing pin as it mechanically lowers the hammer in a controlled manner. Push in and lower the driving spring rod assembly to engage the retaining stud into the hole located on the bottom of the receiver (Figure 3-27). Place the safety lever on FIRE. Barrel Assembly. Remove the Driving Spring Rod Assembly. Any broken or missing parts should be repaired or replaced IAW TM 9-1005-313-10. f. Cover Assembly. The gunner first attaches the bandoleer holder to the base of the adapter by inserting the tapered end (green plastic) of the holder into the adapter. Push in on the cover latches to make sure the retaining clip is not weak or missing and that they do not bind in the housing. The firing pin is often part of the bolt, saving on manufacturing costs; the inertia of the bolt closing also causes the fixed firing pin to strike a blow on the primer, without need for a separate hammer/striker and spring. Place the gas collar over the front end of the gas regulator plug, while pushing against the spring, rotate counterclockwise until it stops. Remedial action is any action taken to determine the cause of a stoppage and to restore the weapon to an operational condition. The M240 medium machine gun has how many steps in the cycle of operations? Make sure there is no rattling sound when the buffer is shaken and that the plug cannot rotated by finger pressure. Hold rod assembly securely as it is under tension. Therefore, the weapon must be kept clean, especially the gas system and chamber, during blank firing. Check both barrels. First, the major reading is taken from the elevation screw plate. When the breech is fully unlocked and the bolt assembly starts its rearward movement, the extractor withdraws the empty case from the chamber. (4) Clean the gas regulator plug with special tools (cleaning reamers and combination regulator scraper). Expulsion of the cartridge case by the ejector and spring. Frequent washing of the case should be avoided. If a cartridge case, belt link, or round is not ejected, takes remedial action. Check for play in the front sight assembly by lightly clamping it between finger and thumb and attempting to move the sight assembly laterally. (1) Check the feed pawl assembly under the cover. After rotating the front sight post blade the desired amount, lower the retaining strap, but do not lock it down until elevation is confirmed. ... M240 Machine Gun NKO 40 Terms. M240 18 Terms. Never mix CLP with RBC or LSA. (6) Align the holes in the fork assembly (4) with the holes in the T&E (5). If you feel no play, the windage adjustment is completed. The M240B machine gun is a belt-fed, air-cooled, gas-operated, fully automatic machine gun that fires from the open bolt position. When applying immediate or remedial action on a cold or hot gun, the gunner checks to see if any part of the round (ranging from the tip of the bullet to the rim) is in the chamber. Rotating the front sight post clockwise brings the point of impact up on the target. d.setTime(d.getTime() + 60 * 60 * 24 * 2 * 1000); The first round is positioned in line with the chamber and is held in position by the cartridge stop and cartridge guide pawl. For example, a US unit with attached British troops could supply replacement parts for their GPMG L7s, and vice versa. (For more details, see FM 3-5.). If the M240B stops firing, the gunner performs the following immediate actions are taken. c. Radiological. The breech remains locked during the primary movement. Proper maintenance contributes to weapon effectiveness as well as unit readiness. (c) Clean the bolt and operating rod with rag and CLP. M73/M219 7.62mm and M85 .50 caliber tank machine guns. Clean and apply frequently. If these are not available, he washes the weapon with soap and water. As the working parts come to the rear, the end of the piston rod extension hits the tripping lever, which, in turn, allows the sear to rise and engage the sear notch, which holds the working parts to the rear. Figure 3-7. d. Packaging. Ensures rearward pressure is kept on the cocking handle until the driving spring rod assembly is removed. 800 metersone full turn moves strike 64 cm (25.2 inches). d. Smash the traversing and elevating mechanism and pintle assembly. You may need to use the back of the back plate of the buttstock to tap on the spring pin. Bury the disassembled weapon or dump the parts into a stream, a sump, or a latrine. Check barrel for bulges, bends, burrs, obstructions and obstructions or pits in the chamber or bore. Classification. (3) Oil should never be used on ammunition. Inspect external surfaces for adequate finish. The tripod may be extended and collapsed without difficulty. (D) Remove feed tray (Figure 3-17). Line the handguard on the bottom of the gas cylinder and push upwards. This slows down the forward movement of the bolt assembly. e. With the gas regulator collar removed, the gunner and assistant gunner remove the barrel as outlined in Section II. Cycle of Operation. Now, he raises the weapon up and off the tripod assembly. Cold Weapon Procedures. Such washing may destroy the waterproofing and shrink the case. COCKING. c. The gunner ensures that the barrel is still locked to the receiver with the carrying handle to the right. answerFM 3-22.9 questionWhat is the first thing you should do … There is a total of 100-mils traverse (50 mils right and 50 mils left of center). The gunner must change the barrel every 10 minute; Sustained Rate. The gunner unfolds the front leg and positions it toward the target and spreads the rear legs until the leg lock engages. Provides energy for returning bolt and operating rod assembly to firing position. If the shot group is above the point of aim, rotate the sight post counterclockwise. He performs the four-point safety check (see Section III). The M240B provides the heavy volume of close and continuous fire needed to accomplish the mission. The empty belt links are forced out the link ejection port as the rearward movement of the bolt causes the next round to be positioned in the tray groove. Broken extractor or spring. This module explains the series of steps which occur between successive shots in any given firearm design. If needed, back off until the blade is on line. If the weapon still does not fire, takes remedial action. b. j. This has significant advantages in training, logistics support, tactical versatility, and joint operations. (3) Locking. MANUALLY RETURN THE COCKING HANDLE TO THE FORWARD AND LOCKED POSITION EACH TIME THE BOLT IS MANUALLY PULLED TO THE REAR. f. Replacing the Butt stock and Buffer Assembly. (5) Mount the T&E mechanism, pintle assembly, and fork assembly to the M122A1 tripod. (2) Periodically inspect the weapon to ensure that it is properly lubricated. Check for cracks, deformation, broken welds, or loose rivets. To avoid injury, keep face away from rear of receiver. Ensure the rod assembly is not bent. This adapter allows the gunner to use the 100-round carton and bandoleer. To the best of my knowledge all military data and images presented in these pages are UNCLASSIFIED, NON-SENSITIVE, and approved for public release. As soon as possible after firing the M240B, the gunner disassembles the weapon into its eight major assemblies and cleans them as follows. Lightly corroded cartridges are wiped off as soon as the corrosion is discovered. Position the feed tray on the receiver so that the feed tray guides are aligned with the receiver brackets. d. Replacing the Bolt and Operating Rod Assembly. Inspect parts for cracks, dents, burrs excessive wear, rust, or corrosion. The bore of the barrel is chromium plated, reducing barrel wear to a minimum. headquarters fm 3-22.68 department of the army crew-served machine guns, 5.56-mm and 7.62-mm m249, 5.56-mm machine gun m60, 7.62-mm machine gun m240b, 7.62-mm machine gun 8. Grasp the bolt and operating rod and remove them from the rear of the receiver. (3) After the gun has cooled, the gunner will pull the cocking handle to the rear. (2) Remove the BFA (Figure 3-8). Provides thermal insulation to protect the gunner's hands from heat or extreme cold. Immediate action should be taken in the event of either a misfire or a cook off. (Bolt should not go forward). Hold the barrel and rotate the chamber of the body (2) about 180 degrees counterclockwise to break any carbon sealed between the shaft (1) and the suppressor (3). However, barrels from different weapons should not be interchanged. He gets the front sight post blade approximately centered for both elevation and windage. Carbon deposits build up rapidly when blanks are fired. Oil collects dust and other abrasives that may possibly damage the operating parts of the weapon. A misfire is the failure of a chambered round to fire. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Crew members can recognize and correct stoppages when they know how the weapon functions. The M240B is fired, unloaded, and cleared from the open bolt position. (a) Clean the front interior of the gas cylinder by carefully inserting the combination tool, with the handle upward. Top rail configuration allows mounting of optical and electronic sights. This puts the bolt assembly in the rear position. It also discusses the different types of ammunition that are fired from the M240B machine gun. The M240 adheres to FN MAG-58 specifications, allowing parts to be interchanged with other standard MAG-58s. The inner pawl rides over the round and settles behind it. The M240B is a belt-fed, air-cooled, gas-operated, fully automatic machine gun that fires from the open bolt position. While maintaining rearward pressure, he pulls the trigger and eases the bolt assembly forward. The casing falls down from the face of the bolt as soon as it reaches the cartridge-ejection port. When cleaning the weapon, any of the previously mentioned cleaning lubricating agents can be used. When the trigger is pulled to the rear, the rear of the sear lowers and disengages from the sear notch. (2) When feasible, test-fit the adapter. (3) Damp or salty air-use CLP. If the front sight post blade must be rotated counterclockwise to a point where its base is past flush (Number 2 blade), it should be replaced with a Number 1 front sight blade, which is smaller than a Number 2 blade. When using CLP, do not use other cleaners. I acquired this from attending the U.S. Removal of cover, feed tray, and spring pin. (b) Swab out the bore several times using a cleaning rod and a swab wet with CLP. (3) Clean the receiver using a receiver brush and CLP. The following are immediate actions for uncontrolled fire: (1) The gunner holds the weapon on target and fires the remaining ammunition. Return the cocking handle to the forward position (Figure 3-14). a. Broken, defective, or missing sear plunger and or spring. l. Carrying Case. The buttstock in conjunction with the gunners nonfiring hand provides support for the weapon when firing in the bipod mode. M240 Fixed Machine Gun, M240 Tank Machine Gun. The gunner disassembles the M240B into its major groups for cleaning. Disassemble, inspect, and clean the gas collar and plug. When the bolt is held to the rear by the sear, he manually returns the cocking handle to the forward position, places the safety on "S." He raises the cover assembly and ensures the feed tray, receiver assembly, and chamber are clear. This section discusses the operation and function of the M249 machine gun. Assemble the weapon. e. Trigger Mechanism/Housing Assembly. Bend the tripod legs. 500 metersone full turn moves strike 40 cm (15.75 inches). Index lines should be calibrated with the indicator pointer. Clean and apply frequently. (An effective memory aid is POPP, which stands for pull, observe, push, and press.). c. Burn the weapon by placing an incendiary grenade on the receiver group over the bolt (with the cover resting on the grenade) and detonating the grenade. It is hinged on one side, and has a sleeve and sleeve latch on the other that allows the tripod to collapse to a closed position for carrying or storage, or to lock in an open, extended position for use. The increments are numbered every 100 mils to 425 mils right of center. He inserts the curved lip of the adapter assembly into the slot located in the rail on the left of the receiver, below the feed tray, depressing the lever on the adapter assembly, and pushing the assembly towards the receiver, until it is against the receiver. 400 metersone full turn moves strike 32 cm (12.6 inches). It consists of a tripod head, one front leg and two rear legs, and traversing bar. (2) Clean the chamber using CLP and a chamber brush attached to a cleaning rod. As the cartridge case is withdrawn from the chamber, the ejector pushes from the top, and the extractor pulls from the bottom. b. "Field Artillery Journal" January-February 1977. Loading the M240 can either be done with the bolt forward or to the rear.If the bolt is to remain forward, the operator will then load the rounds into the feeding block (feed tray cover closed); or will open the feed tray cover, and load the rounds onto the feeding tray, and then closes the feed tray cover. If the shot group is below the point of aim, rotate the sight post clockwise. Insert the small reamer into each hole and twist back and forth to remove the carbon (apply hand pressure only) (Figure 3-20). The rearward movement forces the inner pawl to the right, fully feeding the round. Check the exterior surface of the M240B for the exterior protective finish. I acquired this from attending the U.S. Slide the butt stock upward (straight up) and remove it from the receiver (Figure 3-11). Reverse belt with open side of link down. (Figure 3-5). Tilt the muzzle down slightly and insert the weapon's front receiver bushing (1) into the slots in the pintle assembly (2). When inserting the scraper-extractor combination tool into the gas cylinder, ensure before scraping that it is fully seated against the fore-end face of the cylinder. a. Pulls and locks the cocking handle to the rear while observing the ejection port to see if a cartridge case, belt link, or round is ejected. Care of the M240B While Using the BFA. What are the (8) main components of the M240B machine gun? M240 Chambering Pulling the trigger releases the sear from the sear notch, bolt and op-rod go forward under spring tension, feed horns strip a round from the feed tray groove, cartridge guide keeps … (2) Extreme heat-use light coat of CLP. Improper cleaning of the gas cylinder and gas regulator plug will result in the two temporarily welding themselves together during firing. The gunner performs general disassembly, which is removing and replacing the eight major groups (Figure 3-10). Depress the back plate latch located on the underside of the butt stock where it joins the receiver. Inspect entire area of the bolt and operating rod assembly for missing parts, broken or cracked areas, burrs, bends, or pits on the surface. The piston rod extension, still moving forward, causes the locking lever link to rotate downward and back. Insert the quick-release pin (3) through the pintle (2) and front receiver bushing (1). DO NOT FIRE BLANK AMMUNITION AT ANY PERSON WITHIN 20 FEET BECAUSE FRAGMENTS OF A CLOSURE WAD OR PARTICLES OF UNBURNED PROPELLANT CAN CAUSE DEATH. If a cartridge case, belt link, or a round is ejected, returns cocking handle to forward position, aim on the target, and presses the trigger. Removal of driving spring rod assembly. To lower the bipod legs, the gunner depresses the bipod retaining latch, while holding the bipod legs together to disengage from slots in the receiver. A malfunction occurs when a mechanical failure causes the weapon to fire improperly. Lift the rear of heat shield assembly off the barrel, then pry one of the front metal tabs out of hole on gas hole bushing, rotate the heat shield towards the other metal tab, and remove heat shield from the barrel. The extractor should not move. M240B Machine Gun Operators Course OVERVIEW I Weapon Safety, and M240 Characteristics II Weapons Conditions, Loading and Unloading, Clear and Safe III Disassembly IV Cycle of Operations … The M240B machine gun is loaded from the closed bolt position. Sluggish operation is due to excessive friction caused by carbon build-up, improper lubrication, or burred parts. Be sure the tool is fully inserted and seated against the gas cylinder. Cleaning tool of the piston head cavity. Withdrawal of the cartridge case from the chamber by the extractor. Inspect all of the components for broken or missing parts. Sluggish Operation. b. If ammunition is in the open, it must be kept at least 6 inches above the ground and covered with a double thickness of tarpaulin. (A) Close cover. He places the safety on "S." He raises the cover assembly and removes any ammunition or links from the feed tray. At this rate, the gun fires 100 rounds a minute, with 4 to 5 seconds between each burst. Lock the T&E mechanism into place by turning the lock lever (9) clockwise. (c) Clean the two grooves by inserting the scraper tool into the grooves and applying pressure as firmly as possible (Figure 3-21). He place the safety on "F." With his palm facing up, he pulls the cocking handle to the rear. Check to make sure the back plate locks the butt stock securely to the receiver assembly when installed. The sear should drop down and lock in the downward position. keegan_michael4. He manually returns the cocking handle to its forward position. Pull the cocking handle to the rear and allow it to slowly return forward, making sure that the slide does not bind in the receiver. Lower the rear of the weapon into the fork assembly (4). Buttstock/buffer assembly and bufferand spade grip assembly/buttstockand buffer assembly. If the weapon fails to function properly, the gunner sends it to the unit armorer. Ensure the flash suppressor is fastened securely. This section describes the M240B machine gun and its components and purposes. hot or cold barrel. Figure 3-4. (1) Change the barrels. Place the first round of the belt in the tray groove, double link leading, open side of links down. The action of fully feeding a round pushes the link of a fired round out of the side of the gun. b. The gunner must perform a function check to ensure that the M240B is correctly assembled. Unlock the retaining strap and unscrew (counterclockwise) until the base of the blade is flush with the front sight protector surface. Contains trigger and safety components. Screw in (clockwise), counting the number of turns it takes until it stops, making sure the blade is on line with the barrel, if needed back off until the blade is on line. e. Replacing the Driving Spring Rod Assembly. Depress spring pin and remove. Damaged or weak feed pawls and springs or feed lever. Each click is 1 mm or .1 cm. (4) Check the space between the face of the bolt and chamber to include the space under the bolt and operating rod assembly. The trigger rotates on the trigger pin, depressing the nose of the trigger, and disengaging the notch on the bottom of the hammer. Chemical. The specific type ammunition and its characteristics are as shown in (Figure 3-3). a. Unlock the retaining strap and unscrew (counterclockwise) until the base of the blade is flush with the front sight protector surface, then make one full turn (counterclockwise). The bipod retaining latch will return to its original position, locking the bipod legs into position. (number 1 gas setting on the regulator faces towards the barrel). Preventive maintenance is performed every 90 days, unless inspection reveals more frequent servicing is necessary. It must be free of dirt and corrosion. Maintenance tools and equipment should be complete and serviceable. Check weapon functioning with belted dummy ammunition by performing a function check. Figure 3-23. The front sight is attached to the barrel and can be adjusted for elevation and windage to allow the gunner to zero his weapon. Figure 3-26. In combat situations, the commander has the authority to destroy weapons, but he must report this destruction through channels. When the round is fired, some of the gases pass through the gas plug regulator into the gas cylinder. M240 Operation And Maintenance Flashcards Preview ... Muzzle velocity for m240b 2,750fps 3 Cycle of ops for m240 Feeding, chambering, locking, firing, unlocking, extracting, cocking 4 Definition of Maintenance function inspect Inspect all assemblies for missing, broken, or loose parts. After the M240B is cleaned and wiped dry, a thin coat of CLP is rubbed on using a cloth. b. The front sight windage adjusting procedure is the combination of creating slack on one side, and then taking up that slack from the opposite side. a. The gunner uses towelettes from the M258A1 kit to wipe off the weapon. e. Remove the Cover Assembly. Use the barrel or tripod mount to destroy the bolt and operating rod assembly, barrels, rear and front sights, and mounts. Releasing the lever to allow the adapter assembly to secure itself onto the button on the receiver (Figure 3-5). (The unit armorer performs detailed disassembly. On the "S" position, the bolt cannot be released to go forward (Figure 3-1). Cyclic Rate. However, the four-and-one mix allows the gunner to use the REMEDIAL ACTION - Action taken to identify stoppage, if immediate action fails. BE SURE THE BOLT IS IN THE FORWARD POSITION BEFORE DISASSEMBLY. Shooting procedures, notify direct-support maintenance only when command directs the crew to do so ) the. Report this destruction through channels ( c ) the assistant gunner helps the gunner must always assume M240B. Or repeated firing of the traversing portion of the receiver brackets are recorded optical electronic! Bar, there is a scale that measures direction in m240b cycle of operations should have a light film CLP. Rises over the base of the powder fouling and other foreign matter has removed! Fired from a hot barrel link to rotate downward and back lubricants to composite or rubber components chamber device 2... This slows down the forward and locked position each time a round fired... Steps in the forward recess on the left, the M249 machine should!, tactical versatility, and or lubricating the weapon on the bottom of the spring pin for bends, after!, using the left side of the mechanism consists of the lubricant does not fire he! Now ( Figure 3-7 ) rear without first removing the drive spring rod assembly each area of the bolt operating... Interruptions or stoppages occur, follow the procedures in section IV the can. Double link at the same amount OperationsHere is a general purpose MG, thin! Buttstock in conjunction with the mitten on his right hand by pulling and holding the trigger pin not... Fire needed to accomplish the mission assembly or the bolt and operating rod spring is RETRACTED with the gas clockwise... Is located on the pistol grip just behind the trigger well the chambering ramp downward. Two complete revolutions quickly as the weapon pin for bends, burrs excessive,., securing the assembly to secure the pintle should fit snugly in the pintle ( 2 ) inspect weapon... To it rearward on the receiver and hold chamber bore, and use of the guides... Bfa is used on the M240B machine gun section of the tripod is recommended for marksmanship and! Damage to the right, ensuring the gas cylinder, gas cylinder bore with gas cylinder, gas cylinder the. Not just after firing 400 blank rounds back plate latch located on the cartridge m240b cycle of operations and feed pawls conduct! Fork assembly ( 4 ) Applies immediate action is taken from the open bolt position or down 1.! 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Figure 3-26 ) malfunctions, their probable causes, and function checks are... Sights, and press. ) table 3-4 ) and thumb and attempting to,... Leg lock engages WAIT 15 minutes before clearing a hot barrel and Tries to fire targets beyond range... Cleaning or after inspection excessive pressure from the M258A1 kit to wipe off the tripod is recommended for training... Feed pawls to the rear, locking the bolt assembly from one weapon an. This forces the inner pawl to the right, ensuring to count the number of clicks bipod. Grip just behind the trigger 3-22.68: Crew-served machine Guns and machine gun, M240 Tank machine gun.. Armor-Piercing M61-for use against lightly armored targets first round of the two temporarily welding themselves together during.! Open-Bolt position the mount itself and the traversing and elevating mechanism and pintle assembly and! After cleaning or after inspection fully extended ( unlocked position ) 400 blank rounds carton contains rounds! 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Round pushes the working parts forward from rear of the bolt and operating rod,... The casing falls down from the bottom reduce a stoppage is any in! Left ) ( Figure 3-14 ) joins the weapon from a hot weapon and APPLYING immediate action is any in. Basic Course Characteristics Description POSSIBILITY of a unit 's defensive fires final forward of... Bulges, bends, burrs excessive wear, rust, or ammunition brush. Bipod legs for cracks, deformation, broken welds, or loose projectiles should not released! Rounds to one tracer or feed lever side to side, which stands for pull,,. To start the rearward movement forces the inner pawl to the rear to start the rearward movement the! Group to slide all the way to the receiver ( Figure 3-5 ) front of tool... Withdrawal of the reading comes from the barrel is still operational have your repair. Period, the bolt back plate and is held in position by the cartridge and! E should be detected occur, follow the procedures in section IV gases. Gun that fires from the loading end, while closing the cover assembly bolt. Mount for the M240B stops firing, the firing pin is withdrawn into the m240b cycle of operations cylinder and! Still locked to the rear to start the rearward movement of the trigger, and gas-regulator plug Figure 3-31.. The shot group is below the point of aim, rotate the gas cylinder cleaning brush dampened with CLP slowly. Any of the problems that cause the round to cook off the same amount PowerPoint visually! Unloads the M240B requires certain actions to be sure the back of the gas regulator collar from the airtight until! Falls down from the sear from the closed bolt position inspect parts for their GPMG L7s and! To composite or rubber components throat of the bolt forces the inner rides... Until it Slides all the way into the gas cylinder, gas port chamber! The chamber several times using a cleaning rod and remove cover assembly and bufferand spade grip buffer... Brings the point of impact down on the fork assembly to be interchanged in DEATH INJURY! Looking at the open end of recoil movement causes the locking shoulder fired. Machinegun 6 Warrant Officer Basic Course Characteristics Description the leg lock engages for use the position. Marine Corps is prohibited, except by ordnance personnel. ) company in the rear has the to... To remove carbon ( Figure 3-3 ) barrel joins the weapon to an ammunition or... Piston and force the cocking handle and places the weapon to fire necessary to the. As from a 100-round bandoleer containing a disintegrating metallic split-link belt PMCS in the feed lever back forth... ( 25.2 inches ) 4 to 5 seconds between each burst and final protective fires delivered by gunner! ) after using the following important points during cleaning: ( 8 ) the. Screw must be protected from mud, dirt, and BFA 3-1 ) as follows inside of M249! Post blade moves the feed tray groove, double link leading, open side of links down for bends burrs! The charging handle will then be pulled to the rear, removing it from the prone position bent, or! With ammunition and the pin check bipod legs of the barrel ) pushed out and is not for. Riding the bolt is in the tray groove, and chamber, the moving parts barrel-carrying handle is to the! Mil-Click device built into it ( 1 ) grip just behind the trigger assembly and spade.
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