We have a small number of Heckler & Koch made 30 round steel magazines. These were originally developed by H&K for the British L85 (SA80) & L86 weapons, this curved 30-round magazine provides a substantial improvement (30-50%) during extensive reliability and durability testing. Considered by users in elite US military and law enforcement units as the best and most reliable M16-style magazine in the world, designed for use in any U.S. M16/M4/AR15-style rifle, and any weapon that utilizes this NATO standard magazine.