The first generation of American semi-automatic rifles granted Americans unmatched firepower against Japanese, French, Balkan, Soviet, Korean and Chinese troops which were largely equipped with bolt-action rifles.
The M1A1 is an American semi-automatic rifle in .30 Carbine. This design's only distinguishing feature from its predecessor is the addition of a folding stock, as it was meant for paratroopers who required an even lighter combat rifle.