The Mk 19 grenade launcher is an American 40 mm belt-fed automatic grenade launcher that was first developed during the Vietnam War.
A Mk 19 40 mm grenade launcher mounted on an M3 tripod
US Navy crewman fires a Mk 19 Mod 0 in July 1969
U.S. Navy sailors fire a Mk 19 40 mm grenade launcher during a training exercise in March 2003.
Mk 19 in use by Polish Land Forces
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 M
Mk 19 grenade launcher
…as the Humvee (HMMWV), AAV and Stryker, military jeeps, and a large variety of naval mounts. The Mk 19 automatic grenade launcher replaced the earlier Mk 18 hand-cranked multiple grenade launcher. The 40 mm ammunition used (40×53 mm) is not interchangeable with that used in the M203 (40×46 mm). The M203…
Mk 18 Mod 0 grenade launchers (right and on tripod) at the War Remnants Museum in Ho Chi Minh City.
A Mk 18 grenade launcher (upper) and Mk 19 (lower) displayed at Hanoi Weaponry Museum
A Patrol Craft Fast crewman loads a Mk 18 Mod 0