Faxon Firearms Match Series Barrel Features The Faxon Firearms Match Series Barrel pairs a .223 Wylde chamber with 5R button rifling at a 1:8 inch twist giving the barrel match accuracy with .223 Rem ammunition while still safely handling 5.56 NATO pressures. The 5R rifling design places lands opposite grooves with reduced sharp angles which lessens bullet jacket deformation improves velocity retention and makes the bore easier to clean. The Heavy Fluted contour increases barrel rigidity and adds cooling surface area while trimming weight compared to a straight heavy profile a real benefit on long strings of fire. A rifle-length gas system is tuned for smooth reliable cycling across a wide range of ammunition. Machined from 416R stainless steel and finished in salt bath nitride inside and out the barrel resists corrosion and fouling while remaining easy to clean after a hard day at the range. The M4 feed ramp barrel extension is coated in Nickel Teflon improving lubricity and tightening the fit between the extension and receiver for repeatable accuracy. Every Match Series barrel undergoes stress relieving air-gauge testing and individual MPI inspection along with headspace verification for safety and consistency. An 11 degree recessed target crown protects the muzzle while supporting accurate shot placement and a 1/2x28 thread pattern accepts standard muzzle devices on this rifle-length build. Faxon Firearms Match Series Barrel Specifications Manufacturer: Faxon Firearms Model: Match Series Barrel Caliber: .223 Wylde Barrel Length: 20 Barrel Contour: Heavy Fluted Barrel Material: 416-R Stainless Steel Rifling: 5R Twist Rate: 1:8 Barrel Finish: Salt Bath Nitride Gas System: Rifle Length Muzzle Thread: 1/2x28 Gas Block Diameter: .750 Weight: 2.08 lbs Available At: GrabAGun