Russian pron. Avtomat Kalashnikova, obretza 1947 goda.
English: Automatic Kalashnikov, model (of) 1947 (year).
1. Gas-operated, piston-driven, rotating-bolt, air-cooled, select-fire rifle, fed by means of a detatchable 30-round box magazine designed by Sergeant Mikail Kalashnikov circa 1945-46. Submitted to the Soviet Army Ordnance Board for trial in 1947 and introduced to the Soviet Army in 1949. Very few actual AK-47 rifles still exist; most Kalashnikovs are the AKM (Russian pron. Avtomat Kalashnikova Modernizirovannyj obretza 1959 goda. English: Automatic Kalashnikov, Modernised, model of 1959);
2. Popular usage: any Kalashnikov rifle or LMG.
"The AK-47 is the most widely proliferated assault rifle in the world, with an estimated 90 million units having been made since 1949."