DPMS Quad-Rail, Semi-automatic, AR, .223 Remington/5.56 NATO, 16" Threaded Barrel, 1/2X28 Thread Pitch, Anodized Finish, Black, A2 Pistol Grip, M4 Collapsible Stock, 30 Rounds, 1 Magazine, 13.5" Quad-Rail Handguard DP51655156581