Archives: Glossary

A device incorporated into the mechanism of some firearms where the barrel and the bolt assembly recoil upon firing. The lock frame acts to absorb the shock of the recoiling parts prior to the bolt unlocking and opening.

A metal plate mounted on the stock of a gun to provide for mounting of, or access to, the firing mechanism.

An action in which the breech bolt is locked to the barrel or receiver, until unlocked through a mechanical process.

The firearm component designed to secure the action in the locked position.

An incline, either helical or straight, to assist in closing the action on a chambered cartridge.

The time interval between sear release and the firing-pin striking the primer.

1. Originally, the term was used in reference to long-barreled flintlock rifles. 2. The name given one type of a caliber 22 rimfire cartridge.

A primer which does not fit properly in the primer pocket of a cartridge case or shotshell.

A homogeneous blend of powder having defined chemical and physical properties, as well as performance characteristics.

A term commonly applied to a shotshell with a low metal cup, but properly applies to the height of the internal base wad. Often misused as synonymous with low brass or low cup.