AR-15 16\" M4 Contour Barrel, 5.56 NATO, 1:8, Parkerized

Premium Grade Parkerized AR-15 Rifle Barrel, 16\" Contour M4 Barrel,1 in 8 twist ,Gas port drilled for carbine length gas set up, and threaded for comp.Barrel Extension in rear with M4 feed ramps... drilled with a .070\" gas port opening at carbine length. It has a .750 gas block diameter ready to install into receiver.Chambered in 5.56 NATO Don\'t forget the AeroShell 33MS Mil Spec Armorer\'s Grease!