Bulgarian Arsenal Circle 10 40rd AK Waffle Magazine. 7.62x39. USED magazine, hard to find! Arsenal Circle 10 magazines are inarguably the finest AK magazines in the world-period. They are the only magazines to pass 100% of the military drop tests, every time. Circle 10 magazines are made from the highest quality polymer, contain steel reinforcements front/back, steel feed lips, and a steel locking lug. Should you drop your loaded rifle or run into something, Circle 10 magazines will not break or shatter and leaving you with a non-functioning gun. Circle 10 magazines feed and function perfectly all the time, every time. Very good condition.