The Maglula SCAR H/17 LULA Loader/Unloader loads 10, 20, and 25 round SCAR H/17 type metal and polymer 7.62/.308 magazines. It is simple to use in either loading or unloading mode. The loader/unloader eliminates thumb pain and wear on feed lips. It also prolongs magazine life. It is lightweight and small enough to fit in your pocket. The loader/unloader is crafted from durable reinforced polymer and is reliable in all weather.