The M79 'Bloop Tube' was a post-WWII development intended to provide infantry with a portable, accurate grenade launcher, replacing the bazooka. Its core innovation was the 40x46mm low-pressure system, adapted from German Rheinmetall High-Low pressure technology, enabling a lightweight design. Despite its success in Vietnam, its single-shot nature led to the development of under-barrel launchers like the M203.
This comprehensive entry details the M203 underbarrel grenade launcher, its development from the XM148, and its operational history. It covers mechanical operation, sighting systems, ammunition, and comparisons with its successor, the M320. The information is presented with expert-level detail, drawing from historical context and technical specifications.
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