The Cammenga Easymag, model EM3-556, 30 round M16/AR-15 magazine features an open case design for fast loading, unloading and cleaning. The casing, follower and baseplate are constructed using high-strength 1050 spring steel and finished with a two layer anti-friction coating. A large tip-proof follower and chrome silicon main spring provides reliable feeding performance. The Easymag design has been tested and proven with all varying types of .223 / 5.56 ammunition, drop tests onto concrete, sand, mud, salt-spray, extreme temperature and live-fire tests.