| QF 6 pounder 6 cwt Hotchkiss Mk 1 - 2 | |
|---|---|
 QF 6 pounder 6 cwt Hotchkiss used for gunnery training | |
| Type | Tank gun, armoured train gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1917–1944 |
| Used by | United Kingdom |
| Wars | World War I, World War II |
| Production history | |
| Designer | Hotchkiss |
| Specifications | |
| Barrel length | Bore: 52.12 inch (1.32 m) 23 calibres Total: 60 inch (1.52 m) |
| Shell | Fixed QF, HE (57 x 306R) |
| Calibre | 2.244 in (57 mm) |
| Breech | Vertical sliding block |
| Recoil | Hydro-spring |
| Muzzle velocity | 1,350 ft/s (411 m/s)[1] |
| Effective firing range | 7,300 yards (6,675 m) |
The Ordnance QF 6-pounder 6 cwt Hotchkiss Mk I and Mk II was a shortened version of the original QF 6 pounder Hotchkiss naval gun, and was developed specifically for use in the sponsons of the later marks of British tanks in World War I, from Mark IV onwards.