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 APPLY
Features :
* “8.0”;”Medium Taper Profile”
* 4140 Chrome Moly
* Salt Bath Nitride Finish inside and out
* 1:7 Twist
* 300 AAC Blackout Chamber
* Threaded 5/8-24
* Pistol length gas port
* .750 Gas Journal
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