What guns were invented during World War 2?

Answer 1

The major innovations in small arms during the Second World War were the General Purpose Machine Gun (although development actually started in the interwar period) with the MG-34 and MG-42, and the assault rifle, with the FG-42 and Stg. 44/MP43 being the forerunners to modern military assault rifles, which also pioneered the concept of the intermediate cartridge.

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In addition, the M1, M2, and M3 carbines were invented by the US. The M3 used the first night vision device, an infrared scope. The British fielded the improved version of their rifle, the Enfield No.4 Mk 1. The Soviet Union created the SKS, which was used at the end of the war.