8-inch gun M1
| 8-inch gun M1 | |
|---|---|
| Type | Heavy gun |
| Place of origin | United States |
| Service history | |
| Used by | United States United Kingdom |
| Wars | World War II |
| Production history | |
| Designed | 1939–1942 |
| Produced | 1942–1945 |
| Specifications | |
| Mass | Combat: 69,300 lb (31,400 kg) |
| Barrel length | 33 ft 4 in (10.16 m) L/50 |
| Shell | separate-loading, bagged charge |
| Caliber | 203 mm (8.0 in) |
| Breech | Interrupted screw |
| Recoil | Hydro-pneumatic |
| Carriage | Split trail |
| Elevation | +10° to +50° |
| Traverse | 30° (initially), post-war 40° |
| Muzzle velocity | 2,840 ft/s (870 m/s) |
| Effective firing range | 12.5 mi (20.1 km) (minimum) |
| Maximum firing range | 20.24 mi (32.57 km) |
The 8-inch gun M1 was a 203 mm towed heavy gun developed in the United States. At 32,584 m (35,635 yd), it had the longest range of any US Army field artillery weapon in World War II. It was also used in small numbers by the British Army.