Summary
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.
| 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 | United States Navy |
| Wars | Vietnam War |
| Production history | |
| Manufacturer | Honeywell Corporation and Aeronautical Products Division |
| No. built | 1200 |
| Specifications | |
| Crew | 2 |
| Cartridge | 40 x 46 mm grenade |
| Caliber | 40mm |
| Barrels | 1 |
| Action | Hand cranked, manual reloading |
| Rate of fire | 250 rounds per minute |
| Maximum firing range | 375 metres |
| Feed system | Belt |
| Sights | Iron sights |
Design edit
This weapon is a manually-operated, belt-fed. The use of a split breech mechanism allowed the weapon to be light and simple.
Employment edit
The Mark 18 was used primarily on small boats or in fixed positions such as bunkers; their primary users were the so-called "river rats" and the SEALs. They could be mounted on M2HB, M60, M1919 tripods, or pintle mounts, but could not be fired without such a mount.[citation needed]
Armored Troop Carrier (LCM)s of the Mobile Riverine Force usually mounted two Mk 18s.[1]
References edit
- ^ Sherwood, John (2015). War in the Shallows: U.S. Navy and Coastal and Riverine Warfare in Vietnam 1965-8. Naval History and Heritage Command. p. 176. ISBN 9780945274773.
This article incorporates text from this source, which is in the public domain.
- Mk 18 Mod 0 at Securityarms
- www.quarry.nildram.co.uk
- www.warboats.org