.32 caliber is a size of

ammunition Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weap ...

, fitted to

firearm A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions). The first firearms originated in 10th-century China, when bamboo tubes ...

s with a bore diameter of . .32 in caliber variations include: * .32 ACP (Automatic Colt Pistol), a pistol cartridge * .32-40 Ballard, an American rifle cartridge * .32 H&R Magnum, a rimmed cartridge designed for use in revolvers * .32 Long Colt, an American centerfire fire revolver cartridge * .32 NAA, a cartridge/firearm system from North American Arms and Corbon Ammunition using a .380 ACP case * .32 Remington, an American rifle cartridge * .32 rimfire cartridge, chambered in revolvers and rifles in the late 19th and early 20th centuries * .32 S&W, cartridge was introduced in 1878 for the Smith & Wesson model 1 revolver * .32 S&W Long, a straight-walled, centerfire, rimmed handgun cartridge, based on the earlier .32 S&W cartridge * .32-20 Winchester, the first small-game lever-action cartridge that Winchester produced * .32 Winchester Self-Loading, an American rifle cartridge * .32 Winchester Special, a rimmed cartridge created in October 1901 for use in the Winchester Model 94 lever-action rifle * .327 Federal Magnum, a rimmed cartridge based on the .32 H&R Magnum with elongated case and higher pressure

See also