After nearly a decade and a half of unsuccessful attempts, his workshop released the
DShK in 1938. It is still in widespread use as an anti-personnel gun, an anti-aircraft gun, and a light anti-tank weapon. During
World War II, about 8,000 units of Shpagin's DShK were produced by the
Soviet Union. In 1940, he came up with his most accredited design: the
PPSh-41, which would go on to become the staple automatic weapon used by the
Red Army on the
Eastern Front. The PPSh-41 was a favoured design because it was cheap to produce and easy to maintain at a time when the national arms demand was exceptionally high due to
Germany's invasion of the Soviet Union. In 1944, Shpagin became a member of the
Communist Party. He, in competition with the
AS-44, also created his own prototype assault rifle called the ASh-44, which was operated by a
blowback system. However, the ASh-44 design was dropped from trial testing due to it being uncontrollable on full-auto firing, which led to the issuing of a mandate that all future rifle designs be
locked breech. == Political career and death ==