QF 4-inch naval gun Mk I – III
| Ordnance QF 4-inch gun Mk I, II, III | |
|---|---|
Australian troops with gun on a transport ship, circa. November 1914 | |
| Type | Naval gun Coast defence gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1896 - 1920 |
| Used by | British Empire |
| Wars | Boxer Rebellion, World War I |
| Production history | |
| Designed | 1895 |
| Specifications | |
| Mass | 2,912 pounds (1,321 kg) barrel & breech |
| Barrel length | 160 inches (4.064 m) bore (40 cal); 165.35 inches (4.200 m) total |
| Shell | Separate-loading QF 25 pounds (11.34 kg) Common pointed or Lyddite |
| Calibre | 4-inch (101.6 mm) |
| Breech | Single-motion screw |
| Muzzle velocity | 2,300 feet per second (700 m/s) |
| Maximum firing range | 9,000 yards (8,200 m) |
The QF 4-inch gun Mks I, II, III were early British QF (quick-firing) naval guns originating in 1895. They all had barrels of 40 calibres length.