Serbian made military grade 7.62×39 40rd black polymer magazine. The polymer frame contains steel reinforced rear locking lugs as well as steel BHO (bolt hold open) follower. These magazines are used by Serbian military special forces and have passed rigorous tests. They are tested at high and low temperature ranges and must exhibit consistent strength resistance to shatter and lubricity from -40 C/F to +60 C/140 F. – Unlike most other polymer mags the Serbian ones have to pass a loaded military drop test in a rifle from shoulder height onto concrete. – Polymer frame with steel reinforced rear locking lugs. – Last round BHO (bolt hold open) steel follower. – 40 round capacity. – Military grade. – Fits all AKs using 7.62×39 double stack magazines.