CYCLING AN ACTION

The act of chambering a cartridge, firing the cartridge, opening the action, ejecting the spent cartridge case, and loading the next cartridge if applicable.

CYLINDER

The rotating part of a revolver that contains the cartridge chambers.

CYLINDER ALIGNMENT

The relationship of the axis of the chamber in a revolver cylinder to the axis of the bore.

CYLINDER BORE

A shotgun barrel with a uniform interior diameter forward of the forcing cone to the muzzle end of the barrel.

CYLINDER GAP

In a revolver, the space between the cylinder and the barrel measured with the cylinder in the rearmost position.

CYLINDER INDEXING

In revolver-type firearms, the rotational movement of the cylinder to bring the next chamber into alignment with the bore.

CYLINDER PIN

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.

CYLINDER RELEASE LATCH

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

CYLINDER STOP

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