This is the ASC AR-15 6.5 Grendel 25-round magazine. It can also take 6mm ARC rounds.

ASC’s Stainless Steel 6.5 Grendel magazines are engineered with the highest levels of quality and increased longevity! Their magazines are manufactured 100% start to finish in the USA using .020 gauge 410 Stainless Steel Alloy, heat treated for superior strength and lasting endurance. 

ASC magazines are chemically treated for corrosion resistance [ref QQ-P-35] and coated with our proprietary finish, Marlube – which is a wear-in not wear-off coating that burnishes into the surface providing self-lubricating properties.  

The interior dimensions of OAL 2.316” ± .002 are perfect for reloads.  We manufacture the results you demand and need!