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| Colt Mk 12 | |
|---|---|
 Mk 12 cannon of a RNZAF Douglas A-4K Skyhawk. | |
| Type | Autocannon |
| Place of origin | United States |
| Service history | |
| In service | 1950s – present |
| Wars | Vietnam War Falklands War Gulf War |
| Production history | |
| Designer | Colt's Manufacturing Company |
| Manufacturer | Colt's Manufacturing Company |
| Specifications | |
| Mass | 46.0 kg (101.4 lb) |
| Cartridge | 20×110mm USN |
| Caliber | 20 mm (0.787 in) |
| Action | Gas-operated reloading |
| Rate of fire | 1,000 rpm |
| Muzzle velocity | 1,010 m/s (3,300 ft/s) |
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The Colt Mk 12 is a 20 mm autocannon that was widely used by the United States Navy after World War II.