| Welgun | |
|---|---|
 BSA Welgun submachine gun. | |
| Type | Submachine gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | Trials only |
| Used by | United Kingdom |
| Wars | World War II |
| Production history | |
| Designer | F.T. Bridgman |
| Designed | 1942 |
| Manufacturer | BSA |
| Produced | 1943 |
| Specifications | |
| Mass | 6.8 lb (3.1 kg) |
| Length | 27.5 in (70 cm) |
| Barrel length | 7.8 in (20 cm) |
| Cartridge | 9×19mm Parabellum |
| Action | Blowback, Open bolt |
| Rate of fire | ~500 round/min |
| Muzzle velocity | 365 m/s (1,198 ft/s) |
| Feed system | 32-rd detachable box magazine |
| Sights | Iron |
The Welgun was a prototype submachine gun developed by the British irregular warfare organisation, the Special Operations Executive. Although it performed well in tests, it was never adopted, and was produced in small numbers only.