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The M240C is the right-hand variant on the original coaxial (installed alongside the main weapon) M240, it is identical to the M240 except for the ammunition cover and feed tray. It has a right-handed feed for use on the M2/M3 Bradley Fighting Vehicle and LAV as the coaxial machine gun.
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In this system, the barrel is mounted on rails on which it can recoil to the rear, and the recoil is taken up by a cylinder which is similar in operation to an automotive gas-charged shock absorber, and is commonly visible as a cylinder mounted parallel to the barrel of the gun, but shorter and smaller than it. The cylinder contains a charge of ...
Near the end of the barrel travel, the bolt and barrel unlock. The barrel stops, but the unlocked bolt continues to move to the rear, ejecting the empty shell and compressing the recoil spring. The bolt returns forward under spring force, loading a new round into the barrel. Bolt locks into barrel, and forces barrel to return to battery.
The smoothbore barrel is 5.34 m (17.5 ft) (22.25 calibers) long and for loading is swung into the horizontal position. [3] At the lower end of the barrel is the breech-block and projectile guide. Bringing the M-240 into action takes approximately 25 minutes, slightly less to move it after firing.
A break action is a type of firearm where the barrel(s) are hinged and can be "broken open" to expose the breech. Multi-barrel break action firearms are usually subdivided into over-and-under or side-by-side configurations for two barrel configurations or "combination gun" when mixed rifle and shotgun barrels are used.
They are equipped with a 25 mm M242 Bushmaster autocannon, two 7.62 mm M240 machine guns, and two four-barrel smoke grenade launchers located on the forward left and right sides of the turret. The crew is three; vehicle commander, gunner, and driver; and four passengers (scouts) with combat gear.
Many modern iron sights are designed to be adjustable for sighting in firearms by adjusting the sights for elevation or windage. [2] On many firearms it is the rear sight that is adjustable. For precision shooting applications such as varminting or sniping , the iron sights are usually replaced by a telescopic sight .