Letter: C

The pin around which the cylinder of a revolver rotates. This is a feature found on revolvers in which there is no crane. Also called Axis Pin, Base Pin, Center Pin.

A device which permits the swinging out of the cylinder from the frame of a revolver.

A device to stop cylinder rotation in proper alignment with the barrel in a revolver. Sometimes called a Cylinder Latch or Cylinder Bolt.

A powder and shot separator of a shallow cup design which when loaded with lips down acts to help seal powder gases and so protect the rear of the shot column.

One of the machined grooves on the circumference of a revolver cylinder that is engaged by the cylinder stop in order to assure barrel and chamber alignment. Also called Bolt Notch.

Checkering which is cut with a tool into the surface, either by hand or machine, rather than impressed.

A choke formed by a reamer during manufacture of the barrel of a shotgun.

A generally circumferential separation in the side wall of a cartridge case. May be complete or partial.

A process of forming the spiral grooves in the bore of a rifle barrel by a cutting tool which has a hook shape. Also called Hook Rifling.

The rate which a succession of movements repeats itself; in an automatic firearm, it is usually expressed in shots per minute that are theoretically possible to be fired, given an unlimited supply of ammunition.