The 7.62x51 NATO (.308 Winchester) PMAG 25 LR/SR GEN M3 is a lightweight, cost effective, high reliability magazine for SR25/M110 pattern rifles featuring true 25-round capacity, constant-curve body, anti-tilt follower, and snap on Impact/Dust Cover and features transparent windows to allow rapid visual identification of approximate number of rounds remaining. Designed specifically for military-issue MK11/M110 rifles and mil-spec ammunition.