QF 4-inch naval gun Mk XVI
| Ordnance QF 4 inch gun Mk XVI | |
|---|---|
Twin Mk XVI on HMCS Haida | |
| Type | Naval gun Naval anti-aircraft gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1936--1950s |
| Used by | Royal Navy Royal Canadian Navy Royal Australian Navy South African Navy Royal Malaysian Navy |
| Wars | World War II Korean War Suez Crisis |
| Production history | |
| No. built | 2,555 |
| Variants | Mk XVI* and Mk XXI |
| Specifications | |
| Mass | Barrel & breech 4,495 lb (2,039 kg) |
| Barrel length | 180 inches (4,572 mm) (45 cal) |
| Shell | Fixed QF 35 pounds (15.88 kg) HE 38.25 pounds (17.35 kg) S.A.P. |
| Calibre | 4-inch (101.6 mm) |
| Breech | vertical sliding-block |
| Recoil | hydro - pneumatic 831 millimetres (33 in) |
| Elevation | mounting dependent (-10 to 80 deg on H.A. twin mark XIX mount) |
| Traverse | mounting dependent |
| Rate of fire | 15–20 rounds per minute |
| Muzzle velocity | 2,660 feet per second (811 m/s) |
| Maximum firing range | 19,850 yards (18,150 m) at 45 degrees elevation AA Range: 39,000 feet (11,890 m) at 80 degrees elevation |
| Filling weight | 9 pounds (4.08 kg) |
The QF 4 inch Mk XVI gun was the standard British Commonwealth naval anti-aircraft and dual-purpose gun of World War II.