The ASC AR-15 6.5 Grendel / 6mm ARC 10-15/25-Round Stainless Steel Magazine is a performance-enhanced centerfire rifle magazine, that offers ultra-reliable performance at an affordable price. This lightweight aftermarket 25-round magazine is converted to hold 10 or 15 rounds and features durable 410 stainless steel construction with a corrosion-resistant finish for superior strength and corrosion resistance in harsh tactical environments. The chrome silicon spring and injection-molded polymer follower ensure reliable and smooth feeding in high-stress target or defensive situations.