Cammenga EM3556 30 Round Easy AR-15 Magazines have an open case design that allows you to more easily load the magazine. Clean, load, unload, and check ammunition faster than any other magazine. The follower, casing, and baseplate are all constructed of 1050 spring steel and are finished with a two layer anti-friction coating. An anti-tip follower combined with a chrome silicon spring provide the performance and delivery system you need in a magazine. An unmatched reliability will keep your magazine and gun running longer than ever thought. Load this magazine up to twice as fast as normal magazines.