This aftermarket Sig Sauer magazine features hardened steel feedlips and a frame for smooth and seamless feeding even in high-stress target environments with a patent-pending Omega Joint and frame that wraps 360° to provide maximum strength and unmatched drop-free reliability that's perfect for range days. The injection-molded polymer follower and steel wire spring combine for proper cartridge alignment and reliable feeding while the creep-resistant design ensures the feed lips and body won't spread, even when fully loaded. This magazine features a patent pending fusion of polymer and steel construction with a military-grade Teflon-infused corrosion-resistant coating for unmatched strength and long-lasting durability in virtually any shooting environment. Plus, the ergonomic floorplate allows for easy grip to pull from pouches for lightning-fast reloads. If that's not enough, this magazine is backed by a lifetime warranty from ETS. Don't wait and order a couple of backup mags today! Made in USA.