US Grenade Launchers: M79, M203, and M320

In an effort to provide the US infantryman with more firepower to cover the range gap between the hand grenade and the light mortar, the 40mm M79 grenade launcher--a shoulder-fired, single-shot weapon--entered service with US forces in 1961.

Reliable, easy to use, and lethally effective, the M79 soon became an iconic symbol of the Vietnam War and had a profound influence on small-unit tactics. As the Vietnam conflict continued, it was joined on the front line by experimental models such as t...