Self-lubricating, polycarbonate follower with precision-wound, heat-treated, chrome silicon spring ensures reliable feeding you can count on for defensive maneuvers and tactical competitions. Removable base plate allows easy disassembly for cleaning. Ruger Mini-14 magazines have a heat-treated, carbon steel body that's TIG welded for uniformity and lasting strength. Fits AR-15/M16 chambered in 7.62x39. Mfg: Pro Mag