The MagPump Magazine Loader fits all Mil-Spec AR magazines including .223/.300 Blackout/5.56 NATO magazines. The MagPump can load 60 rounds of ammunition in less than 60 seconds. The hopper auto orients the rounds for quick and safe automation. The MagPump has a polymer housing, attaches to a picatinny rail, and includes a base for easy bench mounting.FeaturesFits all Mil-Spec AR MagazinesPolymer injected molded construction parts and internals Lifetime Warranty