C.A.M Mag Loader Universal Style made of Polymer with Black Finish for Multi-Caliber AR-Platform ETS C.A.M Loader loads rifle mags in seconds. It works idealy with 5.56x45 /.223, .300BLK, 7.62x39, 5.45x39, 9mm, .308 mags, and also picks up rounds from an ammo tray. The mag loader is constructed of an extremely durable polymer and easily fits in your range bag.