The Colt Mk 12 is an American 20mm autocannon, a formidable rapid-firing weapon known for its firepower and versatility, developed by Colt's Manufacturing Company from the Hispano-Suiza HS.404. This autocannon was designed primarily for use on various military aircraft, particularly jet fighters. However, it was also capable of striking unarmoured and lightly armoured ground targets with deadly efficiency. The Colt Mk 12 is infamous for its unreliability, jamming in high-G dogfights over the skies of Vietnam.