Letter: B

A feature on a firearm designed to allow the mounting of a bayonet.

The designation of spherical shot having a diameter of .180” used in shotshell loads. The term BB is also used to designate steel or lead air rifle shot of .175” diameter. Although the two definitions cause some confusion, they have coexisted for many years.

The abbreviation for Bulleted Breech Cap. The original design in 1845 was a percussion cap without a well defined head loaded with a 22 caliber ball. A rimfire cartridge designed for use in Flobert rifles for indoor use. Several variations followed.

A spherical sight typically used on shotgun barrels.

That portion of a bullet’s outer surface that comes into direct contact with the interior surface of the barrel bore when moving through the barrel.

A wider than normal, usually flattened, forward part of a two-piece stock.

A wider than normal, usually flattened, forward part of a stock.

Refers to the fit or fitting of the metal parts of the barrel and receiver with the wood stock.

1. An adjustable device, which is installed in the fore-end of a rifle stock to provide pressure on a barrel. 2. The pressure provided by the wood-to-metal fit.

A form of Bedding Control using machine screw(s) to produce a pressure on the underside of the barrel.