Mk 18 Mod 0 grenade launcher
| Mk 18 Mod 0 grenade launcher | |
|---|---|
Mk 18 Mod 0 grenade launchers (right and on tripod) at the War Remnants Museum in Ho Chi Minh City. | |
| Type | Grenade launcher |
| Place of origin | United States |
| Service history | |
| In service | 1960s−1970s |
| Used by | |
| Wars | Vietnam War |
| Production history | |
| Designer | Honeywell Ordnance Division |
| Manufacturer | Honeywell Ordnance Division |
| Produced | 1965−1968 |
| No. built | 1,200 |
| Specifications | |
| Mass | 17 lb (7.7 kg) |
| Barrel length | 12 in (300 mm) |
| Crew | 2 |
| Cartridge | 40×46mm grenade |
| Caliber | 40 mm (1.6 in) |
| Barrels | 1 |
| Action | Hand cranked, manual reloading |
| Rate of fire | 250 rounds per minute |
| Muzzle velocity | 215 ft/s (66 m/s) |
| Effective firing range | 330 yd (300 m) |
| Feed system | Belt |
| Sights | Iron sights |
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The Mk 18 Mod 0 was a 40x46mm grenade launcher used by the United States Navy during the Vietnam War and also the last known hand crank operated firearm since the Gatling gun. It was replaced by the Mk 19 grenade launcher in service with the United States Armed Forces.