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.

Features:
Length: 10.5"
Material: 4150 Chrome Moly Vanadium
Profile: Government
Finish: QPQ Corrosion Resistant
Gas System Length: Carbine
Gas Block Journal: .750"
Twist Rate: 1:7 inches
Muzzle: 1/2x28 Threaded
Weight: 19 oz