Abstract: A machine gun is provided, which has a detachable barrel. The barrel has a plurality of axially extending outer barrel ridges integral with and projecting from the top of the barrel near its rear end. The body of the machine gun has a barrel catch which is integral with a barrel holding socket and has a chamber adapted to accommodate the barrel ridges reciprocal between locking and unlocking positions. A locking pin is provided, which has a plurality of downward projecting, axially extending body ridges which, together with a stop member, snugly accommodate the barrel ridges when the pin is in the locked position, but intermesh with the barrel ridges in the unlocked position of the pin.

Abstract: A dual feed light machine gun comprises a barrel, a receiver, a cartridge lt feed mechanism assembly provided on top of the receiver, a magazine socket positioned at the bottom side of the receiver and essentially opposite the cartridge belt feed mechanism assembly. The machine gun includes a slide assembly having a slide which is essentially formed of an elongated, horizontal, rectangular frame with an integral bolt housing at the top near the rear end thereof and a gas piston attached at its front end. The bolt housing houses a bolt which has a head portion with upper and lower projections adapted, respectively, to drive a cartridge from either a belt or a magazine into the breech of the gun.