Compatible Magazines: Armalite AR-10A, Colt LE901-16S, CORE Rifle Systems CORE30, JP Enterprises LRP-07, KAC SR25, LaRue OBR, Les Baer .308, LMT .308 MWS, LWRCI REPR, Mega Arms MATEN, Noveske Gen III N6, POF P-308, Ruger SR-762, Ruger Precision Rifle, S&W M&P10, SIG716, and more. Ambidextrous Belt attachment can be used with belts up to 2'' wide Adjustable magazine retention Adjustable 'cant' Made from 0.80'' Kydex The AR-10 Mag Pouch is designed to give you maximum accessibility to your spare magazines. The mag pouch is ambidextrous and can be used as a left or right-hand draw pouch by moving the belt attachment to the opposite side. The hole pattern on the mag pouch enables the user to adjust the pouch at a 45 or 90-degree angle. Most 3-Gun competitors prefer the 90-degree position as it's the quickest way to change mags during a stage.