The Ballistic Advantage Barrel 300BLK 8″ Rigid 1/7 is the next barrel you need. This .300 Blackout chambered 8 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. All NFA/ATF Rules Apply. You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when installed on a Pistol configuration firearm. The Ballistic Advantage Barrel 300BLK 8″ Rigid 1/7 is a remarkable piece of equipment.
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