The Bushmaster® AR-15 .223 / 5.56x45MM NATO 30-Round Magazine features a hard-coat anodized aluminum body, designed to deliver superior reliability and corrosion resistance for lasting service in virtually any environment, without weighing you down. This lightweight magazine features a high-tensile steel wire spring with a polymer anti-tilt follower for smooth, reliable feeding performance, while the removable floor plate offers quick disassembly for easy cleaning and maintenance. Made in USA.