Noveske CHF Chrome Lined Lo-Pro 5.56 Barrel 13.7in Light Infidel Mid Length .750 Gas Block 0. Noveske crafted these AR15 Barrels with a manganese phosphate finish for enhanced strength and extra resistance to corrosion and wear. The Noveske Cold Hammer Forged Chrome Lined Lo-Pro Barrel sports a light contour design that cools off quicker than heavier barrels while greatly reducing weight. Create a more reliable and powerful weapon with this high-strength Noveske CHF Chrome Lined Lo-Pro 1-7 Twist Barrel. Specifications for Noveske CHF Chrome Lined Lo-Pro Barrel: Manufacturer: Noveske Color: Black Fabric/Material: Cold Hammer Forged Caliber: 5.56x45mm NATO Threads per Inch: 1/2x28 Barrel Twist Rate: 1-7 Additional Features: Light Contour .750 Gas Block Condition: New Features of Noveske CHF Chrome Lined Lo-Pro Barrel: CHF Chrome Lined Barrel 1 in 7in Twist Extended feed ramps Manganese Phosphate finish Gas Tube Pinned Low Profile Gas Block Light Contour Package Contents: Noveske CHF Chrome Lined Lo-Pro Barrel Noveske 07000157: CHF Chrome Lined Lo-Pro 5.56 Barrel 13.7in Light Infidel Mid Length .750 Gas Block