M12 Shorty

The shorter barrel and detachable stock allowed for ease of motion and portability, but it decreased accuracy. This led to a phase out of the A66, although its designs contributed to the modern day M4.
the M4A66 Gstar has a shortened stock and a much shorter barrel. The launch system for the m203 has been dropped to drop weight, and also because they didnt use the m203 launcher platform in 1971.