Built for reliable performance and smooth, jam-free operation in a durable, affordable package, the Duramag® AR-15 .223, 5.56, .300BLK 20-Round Magazine features a premium stainless steel body with a corrosion-resistant finish, designed to deliver lasting service and superior crack resistance in virtually any environment. The chrome-plated steel spring, coupled with an anti-tilt polymer follower and enhanced interior and exterior geometries ensures reliable feeding performance, while the welded floor plate offers improved shock and corrosion resistance in fast-action tactical environments.