The 7.62x51 NATO (.308 Winchester) PMAG 10 LR/SR GEN M3 is a lightweight, cost effective, highly reliable magazine for SR25/M110 pattern rifles in the smallest possible magazine size. It features true 10-round capability and includes a constant-curve body, a high-quality stainless steel spring, a self-lubricating anti-tilt follower, and a snap on impact / dust cover.