This hopper-fed, loose-ammo loader is designed to eliminate hand fatigue and reduce magazine loading time by more than 50 percent. Simply load your ammo in the 90-round capacity hopper and let MagPump do the rest. The pump-action lever self-sorts ammunition in either direction, and loads up to 60 rounds in less than 60 seconds. Compatible with all Mil-Spec AR-15 magazines, and .223 Rem, 5.56 NATO and .300 Blackout rounds.