This is a STEEL 5-round magazine for AR-10 type rifles that accept SR25 style magazines in .308 Win/ 7.62x51mm.
Constructed of durable stainless steel with a corrosion-resistant finish, this magazine offers superior reliability in virtually any environment. The high-tensile steel wire spring and injection-molded polymer follower deliver butter-smooth operation, while the precision-engineered feed lips ensure a snug, wobble-free fit for added reliability.