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The M79 grenade launcher is a single-shot, shoulder-fired, break-action grenade launcher that fires a 40×46mm grenade, which uses what the US Army calls the High-Low Propulsion System to keep recoil forces low, and first appeared during the Vietnam War.
M7 and M8 rifle grenade launcher – rifle grenade launcher used with respectively the M1 Garand and the M1 carbine, used by the South Vietnamese. Could fire the M9 and M17 rifle grenades. [88] M79 grenade launcher – main U.S. grenade launcher used by all branches of the US military, ANZAC forces, and ARVN. [34] [88] China Lake grenade ...
The most well known use of the high-low system was by the U.S. Army, with the introduction of the M79 grenade launcher, shortly before the Vietnam War. The M79 fired a 40 mm shell which contained a standard fragmentation grenade with a modified fuze. The cartridge casing contains a heavy cup-shaped "high pressure chamber" in the bottom.
The M463 is a specialist type developed during the Vietnam War by AAI, and is smokeless and flashless (SF), and uses a type of piston system to force the grenade out of the cartridge, but keep the propellant and gases contained. While this does reduce the effective range of the projectile, it allows for an almost silent 40 mm HE grenade.
After the Vietnam War the 105mm tank gun M68 was also provided APER-T ammunition M494. APERS-T rounds in 40×46 mm were also available for the M79, M203, and M320 grenade launchers. Subsequently, it was reported that the USSR had developed similar rounds for 122 mm and 152 mm artillery for use in indirect fire .
Grenade launcher: SPL40 Vietnam: 40 mm Grenade Launcher. Standard issue grenade launcher accompanying the STV-380 rifles. M203: Grenade launcher: T-40 United States Vietnam: 40 mm Grenade Launcher. Replaces the trigger for a lever. Mounts on the Galil ACE 32, STL-1A, M18, M16A2 and TAR-21. [26] Manufactured locally as T-40 at the Z111 Factory ...
In the Vietnam War, U.S. Navy and Coast Guard personnel on boats would lob 40 mm grenades into the water (using the M79 grenade launcher), to preemptively attack Viet Cong swimmers ("sappers") attempting to plant explosives on anchored or moored U.S. watercraft.
In the Vietnam War, U.S. squads usually had at least one soldier whose role was that of a grenadier, armed with just an M79 grenade launcher and an M1911 pistol, though in some cases grenadiers were not even issued this sidearm. The M79 was designed to bridge the gap between the maximum throwing range of a grenade and the minimum distance of ...