Revolver

(n.) One who, or that which, revolves; specifically, a firearm (commonly a pistol) with several chambers or barrels so arranged as to revolve on an axis, and be discharged in succession by the same lock; a repeater.

Thesaurus Entries

automatic, blowgun, blowpipe, firearm, flamethrower, gat, gun, handgun, heater, musket, peashooter, piece, pistol, repeater, rifle, rod, sawed-off shotgun, shooting iron, shotgun, six-gun, six-shooter