This 5.56 chambered 12.5" 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.Specs- 750" Gas block journal, gas system length- carbine and a Government profile. 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.
- Caliber or Gauge: 5.56x45mm
- Length: 12.50"
- Model: Modern Series
- Twist: 1:7"
- Sights: None
- Finish: QPQ
- Type: 12.5" Barrel
- Barrel Type: Carbine Length Government Profile
- Barrel Features: Threaded
