HM Defense 16MBUP-556-L Upper Fits AR-15 223REM/556NATO 16" MONOBLOC Barrel Midlength Gas System with Integral Gas Block
HM Defense 16MBUP-556-L, Upper, Fits AR-15, 223REM/556NATO, 16" MONOBLOC Barrel, Midlength Gas System with Integral Gas Block, 1:8 Twist, Muzzle Brake, Black Color, Anodized Finish, 15" Free Float Rai...