Sons Of Liberty Gun Works Liberty Fighting Barrel Features The Sons Of Liberty Gun Works Liberty Fighting Barrel uses a 5R-rifled 41V50 chrome-moly design chambered for 5.56 NATO with a DLC-coated barrel extension that resists wear at the critical locking lug interface. The chrome lining protects the bore from heat and fouling over extended strings of fire which keeps accuracy consistent when the barrel is run hard. A mid-length gas system paired with the medium contour profile balances weight against rigidity giving the rifle a smoother recoil impulse than shorter gas systems typically allow. The 1/2x28 threaded muzzle accepts standard compensators and suppressors for a wide range of configurations. Finished in a black phosphate coating the barrel resists corrosion while keeping a low-glare duty-appropriate appearance suited to both range use and field carry. Its 13.7 inch length fits mid-length AR-15 builds looking for a maneuverable rifle without sacrificing the ballistic advantages of a longer barrel. The chrome-lined bore also simplifies cleaning and maintenance reducing the buildup that shortens barrel life in high-round-count rifles. Builders upgrading a stock barrel or assembling a new rifle will find this a durable mid-length option ready for hard use. Sons Of Liberty Gun Works Liberty Fighting Barrel Specifications Manufacturer: Sons Of Liberty Gun Works Model: Liberty Fighting Barrel Type: Barrel Caliber: 5.56 NATO Barrel Length: 13.7 Contour: Medium Gas System: Mid-Length Twist Rate: 1:7 Thread Pitch: 1/2x28 Finish: Phosphate Color: Black Compatible Hosts: AR-15 Available At: GrabAGun