Mk 18 Mod 0 grenade launcher
Encyclopedia
The Mk 18 Mod 0 was a 40x46mm grenade launcher used by the US Navy during the Vietnam War and also the last known hand crank operated firearm since the Gatling Gun. It has been replaced by the Mk 19
in service with the United States Armed Forces.
Mk 19 grenade launcher
The Mk 19 Grenade Launcher is a 40 mm belt-fed automatic grenade launcher or grenade machine gun that entered U.S. military service during the Cold War, first seeing action during the Vietnam War and remaining in service today.-Overview:...
in service with the United States Armed Forces.