CMC Triggers 16in .223 Wylde 1-7 CMC Mid Length Gas AR 15 Barrel Black. CMC Triggers constructed these AR15 Barrels from rugged 4150 Chrome Moly Vanadium with an H&M Blacknitride+ finish for increased resistance to corrosion and wear. Each of these CMC Triggers AR-15 SOCOM Profile Threaded Barrels accepts both .223 and 5.56 NATO ammunition and there's a bottom dimple to assist with gas block installation and alignment. These rifle barrels also feature impressive land and groove tolerances that provide enhanced concentricity which greatly improves your weapon's precision. Install any of these compatible CMC Triggers AR15 .223 WYLDE Threaded Barrels for guaranteed performance at the range in the field or on the hunting grounds. Specifications for CMC Triggers AR-15 Threaded Barrels: Manufacturer: CMC Triggers Color: Black Finish: Nitride Fabric/Material: 4150 Chrome Moly Vanadium Caliber: .223 Wylde Gas Block Journal Size-Diameter: .750 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-7 Barrel Material: 4150 Chrome Moly Vanadium Gun Make: AR Platform Gun Model: AR-15 Gas Block Journal Size-Length: 1.13 in Gun Type: Rifle Features of CMC Triggers AR-15 Threaded Barrels: 1:7in twist rate M4 feed ramps for reliability 1/2inx28 thread pattern to fit standard AR-15 muzzle devices 11-degree match crown for increased accuracy Bottom dimple for easy gas block install and alignment Barrel Extension: M4 Type Feed Ramps Air Gauged Package Contents: CMC Triggers AR-15 Threaded Barrels What firearm models does the manufacturer say CMC Triggers AR-15 Threaded Barrels is compatible with? The manufacturer says that CMC Triggers AR-15 Threaded Barrels is compatible with AR-15CMC Triggers CMC-BBL-223-008: 16in .223 Wylde 1:7 CMC Mid Length Gas AR 15 Barrel Black