The Maglula M-16/AR-15 LULA Loader/Unloader loads 10, 20, 30, 40 & 100 round 5.56/.223 magazines including: Magpul PMAG, H&K Metal 416/SA80, Beretta AR 70-90, Thermold, Orlite, Sig Arms black mags, and M16/AR15/M4 USGI (NATO STANAG 4179). 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.