Letter: F

A design in which the forward motion of the firing-pin is unrestrained by a spring or other mechanical means.

The bottom of a box magazine. May be hinged, sliding or immovable.

A barrel with longitudinal grooves cut into the outside surface for all or some portion of the overall length.

A chamber that has longitudinal grooves.

A failure of the firearm to discharge after the trigger has been pulled. It can be one of two types: 1.) a complete misfire, or 2.) a delayed fire.

That part of the firearm mechanism which strikes the primer or the rim of a cartridge to initiate ignition in order to fire the cartridge.

1). An assembly of a barrel and action from which a projectile is propelled through a deflagration of propellant. 2). The serialized portion of a frame or receiver.

The mechanism that utilizes trigger action to release the energy to initiate the primer. It may include but not lmited to the trigger, hammer, sear, disconnector, and/or safety.

Discs of various shapes and thicknesses used to adjust the volume of the contents of a shotshell.

A shotshell loaded for hunting small game animals and birds.