M320 Grenade Launcher Module

M320 Grenade Launcher Module (GLM) is the U.S. military's designation for a new single-shot 40 mm grenade launcher system to replace the M203 for the U.S. Army, while other services initially kept using the older M203. The M320 uses the same High-Low Propulsion System as the M203.

M320 Grenade Launcher Module
Standalone M320 with detachable buttstock
TypeGrenade launcher
Place of originGermany and United States
Service history
In service2009–present
Used bySee Users
WarsWar in Afghanistan (2001–2021)
2022 Russian invasion of Ukraine
Production history
Designed2008
ManufacturerHeckler & Koch
Capco Inc.
Unit costUS$3500
Produced2008
VariantsM320, M320A1
Specifications
Mass1.5 kg (3.3 lb)
Length350 mm (13.7 in.)
Barrel length280 mm (11 in.)

Cartridge40x46mm SR
ActionSingle-shot, double-action
Rate of fire5 to 7 rounds per minute
Muzzle velocity76 m/s (250 ft/s)
Effective firing range150 m (490 ft) (point)
350 m (1,150 ft) (area)
Maximum firing range400 m (1,300 ft)
Feed systemSingle-shot
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