Letter: R

1. Steel insert in the frame of a revolver immediately surrounding the firing-pin hole; also called Firing-Pin Bushing. 2. See Lug, Recoil.

A butt plate, usually of rubber, to reduce the sensible recoil of shoulder firearms.

A device to support a firearm during firing.

The pressure level that remains in the cartridge case or the shell within the firearm’s chamber, and in the bore, the moment the projectile leaves the muzzle of the firearm.

Any firearm equipped with a magazine that holds more than one shot without reloading.

Velocity that a projectile retains at any specific location along its trajectory path.

A mechanical device for hand-loading metallic cartridges or shotshells.

Tools which hold and/or reform cartridge cases or shotshells during a reloading operation.

A device for measuring Free Recoil Energy in which a firearm is suspended from fixed points so as to allow it to swing freely while the barrel remains horizontal.

On a revolver, a lateral extension of the standing breech, to each side, to prevent fired or unfired cartridges from coming out of the chambers and to protect the otherwise exposed primers of unfired cartridges.