Turn the cylinder until the spring clicks into the recess at the rear of the gas cylinder. If the M249 stops firing, he takes the following immediate actions. When the slide goes forward, the hammer should fall to the forward position. Closes the ejection port cover. Center the elevating and traversing handwheels. Insert an empty magazine into the pistol.
The tracer is used for adjustments after observation, incendiary effects, and signaling. The elevation knob remains flush. . The primer well is open to prevent damage to the firing pin. The firing operation works on gas pressure created as a fired round passes through the barrel. Lubricate heavily enough so that the lubricant can be spread with finger. The M193 and M196 cartridge for the M16 can be fired with the M249, but accuracy is degraded; therefore, it should only be used in emergency situations when M855 or M856 ammunition is not available.
If the weapon fires, he reloads and continues firing. This applies in all situations, not just after firing. Position the apertures 4 so the unmarked aperture is up and the 0-200 meter aperture is down. If the M249 machine gun is contaminated by chemical, biological, or radiological agents, the appropriate action must be taken to reduce exposure and penetration. Before using belted ammunition, it must be checked to ensure it is properly linked with the double link or the link tab at the open end of the box.
Removal of the gas cylinder group. The M122 tripod provides a stable mount for the M249, and it permits a higher degree of accuracy and control. Pull the slide to the rear and remove any chambered round. With it, units can engage the enemy along with the capability of individual weapons with controlled and accurate fire. If the gun again fails to fire, wait another 5 seconds, pull the bolt to the rear engage with the bolt latch if applicable , and return the retract ing slide handle to its forward position. Insert a new magazine, retract the slide, and release to chamber another round.
When these deposits become excessive, stoppages occur. Visually inspect the receiver and chamber to ensure these areas contain no ammo. Disassembly beyond what is explained in this manual is prohibited, except by ordnance personnel. Cleaning of the gas vent hole. Remove the buttstock and shoulder assembly by pulling them rearward, while supporting the trigger mechanism.
The components of the M249 machine gun and their purposes are described in and shown. Presses the trigger and at the same time eases the bolt forward by manually riding the cocking handle forward. When removed from the original packing container, the cartridge can be identified by its physical characteristics. The gas plug is checked for obstructions, cracks, and bulges. The elevation knob is rotated four turns toward the buttstock clockwise to lower the strike of the round. Removal of the buttstock and buffer assembly.
Use the thumb of the other hand to push in and upward on the rear of the operating rod assembly. Squeeze and release the trigger, the firing pin block should move up and down while the hammer does not move. Cleaning of the grooves of the piston. Ensure that the bolt remains to the rear to prevent double feeding if a round or cartridge case is not ejected. The safety is pushed from left to right red ring not visible to render the weapon safe, and the bolt cannot be released to go forward. As long as the trigger is held to the rear, the M249 will continue to complete the eight steps of functioning automatically.
Even-numbered settings are on the left side of the scale wheel and are numbered 4, 6, 8, 10, which represent 400, 600, 800, and 1,000 meters, respectively. Place the index fingers of each hand inside the chamber. Each click of the peep sight. The receiver should not be bent or cracked. M855 cartridges in metallic belt. Releases the charging handle do not ride it forward. Rotation of the elevation knob toward the muzzle counterclockwise increases the range, while rotation toward the buttstock clockwise decreases the range.
When using a magazine of ammunition, it must be loaded into the magazine well and be free of dirt and corrosion. Disclaimer: This is a private website that is not affiliated with the U. It is a captured pin; it is not removable. Squeeze the trigger to check double action, the hammer should cock and fall. Push the handguard retaining pin to the left using a cartridge or the spring guide rod; then pull the handguard down. The gunners can recognize and correct stoppages when they know how the M249 machine gun functions. If pistol fails to fire, ensure magazine is fully seated, retract slide and release.