MAC-10

The MAC-10, officially the Military Armament Corporation Model 10 and abbreviated M10 or M-10, is a compact, blowback operated machine pistol and submachine gun developed by Gordon Ingram in 1964. It is chambered in .45 ACP or 9mm, is built predominantly from steel stampings, and fires from an open bolt, with a telescoping bolt that wraps around the rear face of the barrel so that the weapon is compact and its weight is balanced over the pistol grip. A two-stage suppressor designed by Mitchell WerBell III of Sionics reduces the noise and makes the gun easier to control on full automatic. The original rate of fire in .45 ACP is approximately 1090 rounds per minute, and the scaled-down MAC-11 is chambered in .380 ACP. Sales suffered when United States export restrictions on suppressors led foreign customers to cancel orders, which contributed to the financial failure of the Military Armament Corporation, and the civilian semi-automatic pistol version was affected by the 1994 federal assault weapons ban.