Ballistic Advantage Barrel 12.5” 5.56 Modern Series is the next barrel you need. This 5.56 chambered 12.5 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. The Ballistic Advantage Barrel 12.5″ 5.56 Modern Series is a superior piece of equipment.
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