LBE Unlimited Cold Hammer Forged, Barrel, 556NATO, 16.25, 1:7 Twist, Mid-Length, Fits AR-15, Melonite Finish, Black BAR163M High quality components and precise manufacturing make LBE parts ideal for maintaining and upgrading firearms. The durability" reliability and excellent build quality of these parts will ensure years of service you can count on. LBE Unlimited AR barrels are a cold hammer forged" melonite finished" offering that will suit your next build or existing AR platform with the performance you expect. This LBE barrel features a 1:7 twist barrel" mid length gas system" an over all length of 16.25" and finished with 1/2X28 muzzle threading.