AR-10/.308 Magazine Whether you're on the hunt or engaging a long-range target, you need a heavy-duty caliber that delivers power and precision, and When Every Round Counts(TM), you can trust the Hexmag AR-10/.308 SR-25 magazine. Engineered from Hexmag's PolyHex2 Advanced Composite and featuring Hexmag's signature HEXTURE(TM) pattern, these magazines are designed to handle the demands of 7.625x51mm (.308) Winchester calibers. Description: .7.62 x 51mm NATO, .308 WIN 10 round PolyHex2 Advanced Composite Black