Ergo grip 2 flat top ar15-ar10 grip kit suregrip ambi-black FEATURES-Black-Design allows installation on both .223 & .308 AR-15 type lower receivers-Fits modern chassis system stocks commonly made for bolt action rifles & AR-15/AR-10-A2 sized inner cavity compatible with many accessories available on the market-Ergonomically correct finger grooves-Overmolded SUREGRIP(TM) material provides non-slip grip-Virtually impervious to oils & solvents-Comes with The Gapper(TM) Other Features: Comes with gapper, overmolded suregrip provides non-slip grip and texture, a2 sized inner cavity, compatible with many available acc on the mrkt