Bulgarian-made, standard capacity, AK-74 magazines marked 21 in the Double Circle. Polymer magazine body with smooth face and reinforced ribbed sides for increased rigidity, longevity, and the utmost in reliable function. Compatible with most AK-74/RPK 74-pattern rifles in 5.45x39.5mm. These are mil-spec and the only magazine on the market that can pass the military drop test. Steel reinforcements molded inside the polymer body. Mil. surplus, good to excellent condition, marked 21 in Double Circle. 5.45x39.5, 30 rd, Bulgarian, mil-spec, steel reinforced.