16″ M4 Contour Barrel – 5.56 NATO, 1:7 Twist, Nitride Finish Build a reliable and accurate AR15 with this 16″ M4 Contour Barrel. Chambered in 5.56 NATO with a 1:7 twist rate, this barrel stabilizes a wide range of bullet weights for exceptional versatility in tactical or range applications. Its carbine-length gas system ensures smooth cycling, while the premium nitride finish enhances durability, corrosion resistance, and reduces maintenance. Precision-crafted to Mil-Spec standards, it’s the perfect choice for your next build. 16″ length with M4 contour for balanced weight and handling 5.56 NATO chamber with 1:7 twist for optimal bullet stabilization Carbine-length gas system for reliable performance Black nitride finish for superior wear resistance and longevity Upgrade your rifle’s precision—add to cart today!