Combat Armory Barrel 16" 4150 M4 Contour Barrel 5.56 NATO Carbine Length Gas System w/ 1:8 Twist

Product Specs Length 16 Profile Contour Twist 1:7 Finish Black Nitrde Material 4150 Chrome Moly Vanadium Thread Pitch 1/2 x 28 Caliber 5.56 NATO Feed Ramp M4 Flutes N/A Gas System Carbine Gas Block System 0.750 Gas Hole Diameter 0.072 Combat Armory machinist take pride in delivering the very best for our customers use