ZRODelta Range Ready 14.58in .223 Wylde Barrel Black Medium. 58in 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 Range Ready 14.58in .223 Wylde Barrel: Manufacturer: ZRODelta Color: Black Caliber: .223 Wylde Barrel Length: 14.58 in Barrel Profile: Government Barrel Material: 4150 CMV Steel Gas System Length: Mid Length Barrel Twist Rate: 1-8 Last Chance: Yes Package Contents: ZRODelta Range Ready 14.58in .223 Wylde Barrel ZRODelta 7046-0107-1369: Range Ready 14.58in .223 Wylde Barrel Black Medium