Abstract: A pistol (10) has a combination action spring guide and slide buffer (58). The spring guide and buffer has a plastic head segment (64) and an integral plastic guide rod (66). The head segment has two enlarged diameter portions (68, 70) separated by a recess into which a metal plate (76) is positioned. The metal plate prevents deformation and deterioration of the head segment which acts as a cushion for the pistol slide (20).

Abstract: A semiautomatic shotgun having a gas operating mechanism for unlocking a bolt and moving it from battery position. The operating mechanism includes an action bar and an inertia weight assembly which comprises a plurality of inertia elements. The inertia elements, the action bar and the bolt are arranged for movement relative to each other and impact at different times during the operating cycle. A return spring cooperates with the inertia weight assembly to maintain the various parts of the mechanism in fixed position relative to each other when the bolt is locked in battery.

Abstract: A device for positively blocking the firing pin in a firearm having a reciprocating breech-bolt that is substantially enclosed within the receiver, in which a finger-piece is provided on the outside of the receiver for shifting a safety bar into and out of a position to move a member on the breech-bolt into or out of a blocking position with respect to the firing pin such that the firing pin can not be driven home to discharge a cartridge.

Abstract: A detent device for a magazine cap on a tubular-magazine firearm, in which the magazine spring is employed to urge a detent member at the front end of the magazine into engagement with a detent surface inside the cap in order to prevent accidental loosening of the cap.