MagPump's magazine loader is the fastest, easiest way to load your magazines. This hopper-fed, loose ammo loader is designed to eliminate hand fatigue and reduces loading time by more than 50 percent. The pump-action lever self-sorts ammunition in either direction, and loads up to 30 rounds in less than 30 seconds.The MagPump loader has built-in safeties to prevent damaging rounds while loading and stops loading when the magazine is full. This rifle model mounts to any Weaver or Picatinny rail and has a 90-round capacity hopper. This AR-15 standard model is constructed of lightweight, durable polymer and is compatible with all Mil-Spec AR-15 magazines, and .233 Rem, 5.56 NATO and .300 Blackout rounds.