Radian Weapons Complete Upper, 223 Wylde, 10.5" Barrel, 1:8 Twist, SilencerCo ASR Flash Hider, Cabine Length Gas, 10" MLOK Handguard, Radian Raptor-SD Charging Handle, Radian Enhanced Bolt Carrier Group, Cerakote Finish, Brown, Fits AR-15 R0451