Andersons AOR 16 6.5 Grendel Complete upper: Comes with a 16 6.5 Grendel barrel 18 twist carbine gas system 5824 threads 7075 T6 Forged Upper Receiver A2 Plastic Carbine HandGuard 308 A2 Flash Hider Standard Charging Handle and 6.5 BCG. The barrel is chambered for .135 bolt face depth. Comes in retail packaging.