JE Machine Tech AR-15 .223 Wylde Threaded Pistol Barrel 5in 1-5 Twist .750 Gas Block Micro Length Gas System 1/2x28 4150 CrMoV Steel Nitride Black. 223 WYLDE PDW BARREL Platform: AR-15 Material: 4150 CrMoV steel Finish: Black Nitride Chambering: .223 Wylde Twist rate: 1:5 Overall length: 5 Gas system length: Micro gas .750 gas block Thread Pitch: 1/2-28 Specifications for JE Machine Tech AR-15 .223 Wylde Threaded Pistol Barrel: Manufacturer: JE Machine Tech Color: Black Fabric/Material: 4150 CrMoV Steel Caliber: .223 Wylde Threads per Inch: 1/2x28 Gun Make: AR Platform Gun Model: AR-15 Features of JE Machine Tech AR-15 .223 Wylde Threaded Pistol Barrel Platform: AR-15 Material: 4150 CrMoV steel Finish: Black Nitride Chambering: .223 Wylde Twist rate: 1:5 Overall length: 5 Gas system length: Micro gas .750 gas block Thread Pitch: 1/2-28 Package Contents: JE Machine Tech AR-15 .223 Wylde Threaded Pistol Barrel What firearm models does the manufacturer say JE Machine Tech AR-15 .223 Wylde Threaded Pistol Barrel is compatible with? The manufacturer says that JE Machine Tech AR-15 .223 Wylde Threaded Pistol Barrel is compatible with AR-15JE Machine Tech PS-BAL22: AR-15 .223 Wylde Threaded Pistol Barrel 5in 1-5 Twist .750 Gas Block Micro Length Gas System 1/2x28 4150 CrMoV Steel Nitride Black