JE Machine Tech AR-15 .223 Wylde Threaded Rifle Barrel 16.25in M4 Carbine Length 1-8 Twist .750 Gas Block 1/2x28 4150 CrMoV Steel Nitride Black. Drilled reamed button-rifled profiled and chambered to exact dimensions in compliance with SAAMI specifications; high-precision manufacturing processes ensure both accurate and repeatable performance for thousands of rounds. Specifications for JE Machine Tech AR-15 .223 Wylde Threaded Rifle Barrel: Manufacturer: JE Machine Tech Color: Black Finish: Nitride Caliber: .223 Wylde Barrel Length: 16.25 in Gas System Length: Rifle Length Gas Block Journal Size-Diameter: .750 in Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: AR-15 Features of JE Machine Tech AR-15 .223 Wylde Threaded Rifle Barrel Platform: AR15 Chambering: .223 Wylde Twist rate: 1:7 Overall length: 16 Gas system length: Mid length .750 gas block Thread Pitch: 1/2-28 Material: 4150/4151 CrMoV Steel Finishing: Black Nitride Package Contents: JE Machine Tech AR-15 .223 Wylde Threaded Rifle Barrel What firearm models does the manufacturer say JE Machine Tech AR-15 .223 Wylde Threaded Rifle Barrel is compatible with? The manufacturer suggests that JE Machine Tech AR-15 .223 Wylde Threaded Rifle Barrel is compatible with AR-15JE Machine Tech PS-BAL6: AR-15 .223 Wylde Threaded Rifle Barrel 16.25in M4 Carbine Length 1-8 Twist .750 Gas Block 1/2x28 4150 CrMoV Steel Nitride Black