Brenton USA Long-Load Rifle Magazine, AR-15, 300 Blackout, 17 Rounds, Black, LL-1-30B-17RD

Using .025'' thick wall 410 stainless steel and heat treated for superior strength and durability. Brenton magazines are also chemically treated against corrosion (Q-P-Q-35). Interior dimensions measure a generous 2.315 +/- .002 for long loads. These magazines will last you a lifetime.