This 16-inch Bloodline barrel from Rosco Manufacturing is chambered in 5.56 NATO and crafted from 4150 chrome moly vanadium steel with a nitride finish. The barrel features a 1:7" rate of twist and is designed to deliver reliable performance with an improved gas curve for better dwell times.Key FeaturesBarrel Length: The barrel measures 16 inches for optimal performance in a variety of applications.Rate of Twist: Offers a 1:7" twist rate, suitable for stabilizing a wide range of bullet weights.Material: Constructed from 4150 CMV steel with a nitride finish for enhanced durability and corrosion resistance.