Product Description
Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. ALL NFA RULES APPLYFeatures :"8.0";"Medium Taper Profile"4140 Chrome MolySalt Bath Nitride Finish inside and out1:7 Twist300 AAC Blackout ChamberThreaded 5/8-24Pistol length gas port.750 Gas Journal