DETAILS Barrel Length: 14.5" Gas System: Carbine-Length Barrel Steel: 4150V Barrel Finish: Nitride Muzzle Thread: 1/2-28 Chamber: .223 Wylde Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Muzzle Device: Pin/Weld Sabre Compensator Receiver Material: Forged 7075 T6 Receiver Type: M4 T-Marked Hand Guard Type: PSA 13" PSA Sabre QD Rail Bolt Carrier Group: PSA Custom Fathers of Freedom BCG by MicroBest with Sprinco Extractor Spring Bolt Steel: Carpenter 158 Bolt Carrier Finish: Mag-Phosphate Finish Charging Handle: Radian Raptor LT