The maglula sr25/dpms/pmag lula loader/unloader loads 5, 10, 20, & 25 round sr25 type metal and polymer 7.62/.308 magazines.It does not fit early ar10 waffle 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.Caliber: 308 WinFinish: BlackModel: Loader and UnloaderMaterial: PolymerType: Loader/UnloaderModel Fit: SR25, DPMS, PMAGCapacity: 0