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. It is crafted from durable reinforced polymer and is reliable in all weather.