The 7.62x39mm round is a rimless bottlenecked intermediate cartridge or Soviet origin that was designed during World War II. Due to the worldwide proliferation of the Soviet SKS and AK-47 pattern rifles, as well as RPD and RPK light machine guns, the cartridge is used by both militaries and civilians alike.
The 7.62x39mm Bullet can only be used with both variants of the AK-47 as well as the AK-15.
The rounds can be chambered individually, or used with a magazine.