Optimized for use with SAAMI-spec 7.62x51/.308 Winchester ammunition Commercial rifle compatibility includes the new Armalite AR-10A, Bushmaster .308 ORC, Colt LE901-16S, CORE Rifle Systems CORE30, DPMS LR308, JP Enterprises LRP-07, KAC SR25, LaRue OBR, Les Baer .308, LMT .308 MWS, LWRCI REPR, Mega Arms MATEN, POF P-308, Remington R-25, Ruger SR-762, S&W M&P10, SIG716, and others* Next-generation impact and crush resistant polymer construction Constant-curve internal geometry for smooth feeding Anti-tilt, self-lubricating follower for increased reliability High-quality stainless steel spring, black-oxide coated (MIL-DTL-13924D) Anti-glare translucent MagLevel windows on both sides of the body along with a painted indicator on the spring allows for easy determination of rounds remaining from 1 to 25 Ribbed gripping surface and new aggressive front and rear texture for positive magazine...