Enhanced for performance, this barrel from the Performance series is equipped with a nickel boron coated extended M4 feed ramp extension. This feature not only facilitates smoother feeding but also contributes to the overall reliability and operational efficiency of the firearm. This 18 inches 6MM ARC barrel is crafted from 416 stainless steel and treated with a QPQ finish for corrosion resistance. Our Premium Black series barrels are equipped with a nickel boron-coated extended M4 feed ramp extension, enhancing reliability and smooth feeding.