Anderson Manufacturing Contour Barrel 16 for AR-15 1/2-28

Contour Barrel Features Perfect for your custom AR15 upper group this carbine length barrel improves shot to shot consistency. This barrel has an M4 contour made out of 4150 Chrome Moly Vanadium. It is non-treated has a parkerized finish and a twist rate of 1:8. With a thread pattern of 1/2 - 28 the barrel is 16-inches. Contour Barrel Specifications Model: Contour Barrel Treated: Non-treated Barrel Length: 16 Inch Barrel Material: 4150 Chrome Moly Vanadium Barrel Finish: Nitride Barrel Contour: M4 Contour Twist Rate: 1:8 Gas System Length: Carbine Length Gas Block Diameter: .750 Inch Thread Pattern: 1/2 - 28 Weight: 4lbs