Bar-action Lock.—When the lock is bedded partly back of the barrel and partly along side of it.
Barrel.—The iron or steel tube of the gun through which the charge passes in the act of firing.
Barrel-loop.—A metallic loop under the barrel, through which a small bolt passes to hold the barrel into the stock.
Bents.—The notches in the tumbler of a gun-lock.
Black-Walnut.—A tree, native to North America, whose wood is extensively used in the manufacture of fine gun stocks; the Juglans nigra of botanists.
Binocular Vision.—Seeing with two eyes.
Bolt.—The part which, in a breech-loader, passes into the lump of the barrel and holds it into the action when the gun is closed.
Bore.—The interior of the barrel along which the charge passes.
Bores are made of the following forms: True cylinders; cylinders enlarged at the breech; cylinders enlarged or freed at the muzzle; tapered to narrow at the muzzle; narrowed to close at the muzzle; cylindrical, with ring cut out near muzzle; narrowing the muzzle with depth cut out, modified, etc. Bores are also made elliptical, hexagonal, polygonal, etc.
Brazing.—Soldering iron with brass or copper as a solder.