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 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
