Ballistic Advantage Barrel Modern Series 5.56 10.5″ is the next barrel you need. This 5.56 chambered 10.5 inch Government Profile 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. Ballistic Advantage Barrel Modern Series 5.56 10.5″ is a superior piece of equipment.
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