This is a Magpul Industries Magazine known as the M3 chambered in 308 Winchester, model MAG577-BLK.
The 7.62x51 (.308 Winchester) PMAG 25 M118 LR/SR GEN M3 Window is a lightweight" cost effective" high reliability magazine for SR25/M110 pattern rifles using longer than SAAMI-spec match ammunition up to 2.830" OAL. Features true 25-round capacity" constant-curve body" anti-tilt follower" snap on Impact/Dust Cover" and transparent MagLevel(TM) windows to allow rapid visual identification of approximate number of rounds remaining.
Features:
25RD capacity
Black polymer construction
Anti-tilt, self-lubricating follower
Flared floorplate
High-quality stainless steel spring
