#Gun jam immediate vs remedial action series#

When the safety is pushed to the right, the letter 'S' is visible indicating the weapon is on safe. The safety mechanism is located on the pistol grip just behind the trigger well.

The rear sight is attached to the rear of the receiver and is marked for each 100 meters of range, from 200 to 800 meters on the upper surface of the leaf, and on the reverse side of the leaf from 800 to 1,800 meters. Since the sight on the barrel is adjusted to zero the machine gun, both barrels must be zeroed before combat and training. The front sight is attached to the barrel and can be adjusted for elevation and windage to allow the gunner to zero his weapon. Provides guide for ejection of spent cartridges.įigure 3-2. The tripod T&E mount assembly is flexible, provides a stable mount, absorbs recoil, and improves accuracy. Has a slotted top to allow air to circulate around barrel for cooling purposes. Serves as guide for positioning cartridge to assist in chambering. Top rail configuration allows mounting of optical and electronic sights. Provides feeding stripping, chambering, firing, extracting, and ejecting of cartridges using propellant gases for power.įeeds linked belt, positions and holds cartridges in position for stripping, feeding, and chambering.

Provides energy for returning bolt and operating rod assembly to firing position. Supports M240B machine gun in prone position. Moves in a guide rail fixed to the right side of the receiver.Ĭontrols the firing of the machine gun. Provides thermal insulation to protect the gunner's hands from heat or extreme cold.

#Gun jam immediate vs remedial action series#

Houses action of the weapon and, through a series of cam ways, controls function of weapon. Serves as support for all major components. Protects the gunner's hand from a hot barrel.Ĭomposite buttstock: buffer housing that contains spring washers to absorb recoil from bolt and operating rod assembly at the end of recoil movement.Ĭonsists of receiver, handguard, bipod, and rear sight assembly. Houses the cartridge for firing and directs the projectile. The components of the M240B machine gun and their purpose are shown in Table 3-2 and Figure 3-2.Ĭonsists of the barrel, flash suppressor, carrying handle, heat shield, front sight assembly, and gas-regulator plug. M240B machine gun, bipod and tripod mounted. IF YOU DO SO, IT MAY RESULT IN DEATH OR INJURY.įigure 3-1. DANGERĭO NOT INTERCHANGE THE BARREL ASSEMBLY OR THE BOLT ASSEMBLY FROM ONE WEAPON TO ANOTHER. The bore of the barrel is chromium plated, reducing barrel wear to a minimum. However, barrels from different weapons should not be interchanged. A spare barrel is issued with each M240B, and barrels can be changed quickly as the weapon has a fixed head space. Empty cases are ejected from the bottom of the gun. As the gun is fired, the belt links separate and are ejected from the side.

Thus, the gun functions automatically as long as it is supplied with ammunition and the trigger is held to the rear. The gas from firing one round provides the energy for firing the next round. Ammunition is fed into the weapon from a 100-round bandoleer containing a disintegrating metallic split-link belt. The M240B is a belt-fed, air-cooled, gas-operated, fully automatic machine gun that fires from the open bolt position. ( Figure 3-1) It can be mounted on a bipod, tripod, aircraft, or vehicle. The M240B is a general-purpose machine gun. This section also discusses the ammunition adapter and the blank firing adapter for the M240B machine gun. It also discusses the different types of ammunition that are fired from the M240B machine gun. This section describes the M240B machine gun and its components and purposes. This chapter describes the weapon and the types of ammunition in detail and provides a table of general data. The long-range, close defensive, and final protective fires delivered by the M240B form an integral part of a unit's defensive fires. The M240B is used to engage targets beyond the range of individual weapons, with controlled and accurate fire. The M240B provides the heavy volume of close and continuous fire needed to accomplish the mission. The M240B machine gun supports the rifleman in both offensive and defensive operations.