10 round polymer magazine for .308 / 7.62x51 / .243 Win / 7mm-08 / .358 Win / .260 Rem / 6.5 CM. Exclusively compatible with Archangel PES stocks AAS10, AA700SA, AA1500SA and Archangel Precision Elite stocks Type D magwell. Maximum overall length 2.815 inches. Magazine body constructed from high-strength carbon fiber and glass reinforced black polymer. Injection molded.