The M203 is a single-shot, pump action, 40 mm under-barrel grenade launcher designed to attach to a rifle. It uses the same rounds as the older stand-alone M79 break-action grenade launcher, which utilizes the high-low propulsion system to keep recoil forces low.
The M203 is a single-shot, pump action, 40 mm under-barrel grenade launcher designed to attach to a rifle. It uses the same rounds as the older stand-alone M79 break-action grenade launcher, which utilizes the high-low propulsion system to keep recoil forces low.
Source: Wikipedia "M203 grenade launcher" · CC BY-SA 4.0
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