Maglula LU20B: The Maglula M1A/M14 Lula Loader/Unloader loads 10, 20, and 30 round M1A type magazines and AR-10 magazines with a rear catch. 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.