"Georgy Semyonovich Shpagin (Russian: Георгий Семёнович Шпагин; 17 April 1897 – 6 February 1952) was a Russian weapons designer. He is best known as the creator ...
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of the famous PPSh-41 submachine gun, as well as working with Vasily Degtyaryov on the DShK heavy machine gun." - (en.wikipedia.org 05.02.2021)