Automatic Colt Pistol, a type of ammunition.

The mechanism of a firearm involved with presenting the cartridge for firing, and in removing the spent casing and introducing a fresh cartridge.

A firearm which continues to fire as long as the trigger remains depressed.

The rear of two gripstraps on a handgun, which lies beneath the heel of the hand when gripping the gun.

A military term for standard, full metal jacketed ammunition.

The science of cartridge discharge and the bullet’s flight.

The long tubular cylindrical part of a firearm, bored out to provide an exit path for the discharging bullet. The barrel serves the purpose of providing direction and velocity to the bullet.

A semi-automatic firearm whose breechblock and barrel are not mechanically locked together when fired. In such case the breechblock immediately begins to separate from the barrel upon firing. Blowback [..]

The chemical process of artificial oxidation (rusting) applied to gun parts so that the metal attains a dark blue or nearly black appearance.

The interior of a gun barrel.