The MagPump Polymer Magazine Loader is a hopper fed, loose ammo loader for 9mm Luger (FMJ, JHP, SJHP, HP, SN, and LRN). Compatible with double stacked magazines for pistol models in Glock, Sig, Smith & Wesson, Springfield Armory, Ruger & CZ. This loader helps eliminate hand fatigue causes from loading. Built-in safeties prevent damaging rounds while loading and stops loading when magazine is full. Features50 round capacity hopperReduces magazine loading time by more than 50%Includes 6 retainers that adapt to various magazine brandsSelf-sorting hopper orients ammunition in either directionRequires much less physical effort and strength to fully load magazinesPolymer injected molded construction parts and internals