New M&P 15 pistol. The drum mag is just for laughs. Haven't fired it yet. Looking for suggestions on optics. I have some BUIS to throw on. My other AR setups are
AR15 Pistol-ATI OMNI MAXX-Black For Sale - AtlanticFirearms.com
People Eater: AR-15 5.56 Pistol in Anodized Purple | Veriforce Tactical