ZRODelta Mission Ready 9.85in .223 Wylde Barrel Black Medium. 85in barrel is cold hammer forged nitride treated and is chambered in .223 Wylde with a 1/8in twist for maximum durability and accuracy. Specifications for ZRODelta Mission Ready 9.85in .223 Wylde Barrel: Manufacturer: ZRODelta Color: Black Finish: Nitride Caliber: .223 Wylde Barrel Length: 9.85 in Barrel Profile: Government Barrel Material: 4150 CMV Steel Barrel Twist Rate: 1-8 Package Contents: ZRODelta Mission Ready 9.85in .223 Wylde Barrel ZRODelta 7046-0108-1369: Mission Ready 9.85in .223 Wylde Barrel Black Medium