Geissele barrels are precision machined and cold hammer forged utilizing the highest quality materials at our state of the art facility in North Wales, PA to ensure the highest quality and consistency of each barrel. Our barrels are High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI). The accuracy and reliability of Geissele CHF barrels makes them an ideal choice for a hard use duty weapon, precision tuned competition gun, and everything in between. Specifications for Geissele CHF AR-15 5.56mm Threaded Barrel: Manufacturer: Geissele Color: Black Fabric/Material: Chromolly Steel Caliber: 5.56mm Barrel Length: 11.5 in Gas System Length: Carbine Length Gas Block Journal Size-Diameter: .750 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-7 Gun Make: AR Platform Gun Model: AR-15 Weight: 1.3 lb Package Contents: Geissele CHF AR-15 5.56mm Threaded Barrel