Because it’s an ultra-reliable rifle that shoots big-boy 7.62mm ammo . . . Why NATO copied Russia’s AK-47
The famous Soviet automatic rifle was such a success that even a NATO member state tried to create its own version.
Early in the Cold War the opposing sides in the East and West invented small arms that would later become their standard infantry rifles for decades to come – the AK-47 in the Soviet Union, M14 and M16 in the U.S.A, Germany’s G3, Belgium’s FN FAL and others.
However in the mid 50s Danish engineers created the Madsen LAR (light automatic rifle), a copy of the AK-47 that used Soviet 7.62×39 mm ammunition.
The Danes, though, were too late to the party. Oh, and their rifle wouldn’t accept AK magazines. Duh.