The Caldwell Magazine Charger loads AK magazines in just seconds. The Mag Charger accepts 50 rounds of 7.62 x 39 loaded ammo and transfer system instantly transfers from ammo box directly to the charger. Charger load 5 rounds per “stroke” with automatic advance. Compatible with all AK platform mags both mil spec and molded plastic. Charger is constructed of durable polycarbonate.