Faxon Firearms AR-15 Combat Series Barrel Features The Faxon Firearms Combat Series Barrel is machined to a true M4 profile matching military-standard contour for the heat management and weight distribution shooters expect from a duty-grade AR-15 barrel. Built from certified 4150 CMV steel that has been heat-treated and stress-relieved for toughness the barrel is engineered to handle sustained high-volume firing without losing accuracy or reliability. A hard chrome-lined bore increases barrel life significantly over uncoated options and resists fouling buildup during extended range sessions or duty use. The 1:7 twist rate stabilizes the full spectrum of common 5.56 NATO bullet weights from lightweight to heavier match-grade projectiles. This 14.5 barrel is button rifled and finished in a classic mil-spec black phosphate exterior coating providing low-reflectivity corrosion protection that suits both range and duty environments. A carbine-length gas system keeps the barrel compatible with standard AR-15 setups ensuring reliable cycling with a proven widely supported gas system length. The 1/2x28 threaded muzzle accepts standard AR-15 muzzle devices giving builders flexibility in compensators flash hiders or suppressor mounts. Faxon Firearms backs every Combat Series barrel with thorough quality control including MPI inspection air-gauge testing and headspace verification giving AR-15 builders confidence in a barrel built to mil-spec standards. Faxon Firearms AR-15 Combat Series Barrel Specifications Manufacturer: Faxon Firearms Model: Combat Series Barrel Caliber: 5.56 NATO Color: Black Material: Chrome Moly Vanadium Finish: Chrome Mag Phosphate Barrel Type: Button Rifled Twist Rate: 1:7 Barrel Length: 14.5 Diameter: .750 Thread Pattern: 1/2x28 Weight: 1.61 lbs Available At: GrabAGun