MAC-10
The Military Armament Corporation Model 10, officially abbreviated as "M10" or "M-10", and more commonly known as the MAC-10, is a compact, blowback operated machine pistol/submachine gun that was developed by Gordon Ingram in 1964. It is... Wikipedia
Manufacturer: Military Armament Corporation
Invention: Gordon Ingram
Action: Straight blowback
Barrel length: 146 mm (5.75 inches)
Cartridge: .45 ACP (11.43×23mm); 9×19mm Parabellum
Feed system: 30-round detachable box magazine (.45 ACP); 32-round detachable box magazine (9×19mm);
In service: 1970–present