The AK-47 is a selective-fire, gas-operated 7.62×39mm assault rifle, first developed in the Soviet Union by Mikhail Kalashnikov. It is officially known in the Soviet documentation as ''Avtomat Kalashnikova'' . It is also known as Kalashnikov, AK, or in Russian slang, Kalash. Design work on the AK-47 began in the last year of World War II (1945).
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