The Caldwell® .22LR Rotary Mag Charger is an innovative magazine loader, engineered to load a variety of rimfire rifle magazines quickly, safely, and effectively. Featuring heavy-duty polycarbonate construction with a rotary loading mechanism and a plastic 100-round hopper, the Mag Charger automatically aligns each round for quick, snag-free loading. Simply insert the magazine and twist the plunger until your mag is fully loaded. Compatible with all factory and aftermarket Ruger® 10/22® rifles and T/CR22 magazines.