All NFA/ATF Rules Apply. You may not install this upper on a lower receiver unless it is a NFA Registered SBR, Machine Gun, or Pistol. Possession of this upper along with a Non-NFA Lower is Prohibited, except when installed on a Pistol configuration firearm.
Barrel Length: 10.5"
Gas System: Pistol Length
Barrel Profile: HBAR Profile
Barrel Material: 4140 Chrome Moly Vanadium
Barrel Finish: Melonite
Muzzle Thread: 5/8x24
Twist Rate: 1:8
Barrel Extension: M4 Feed Ramp
Gas Block Type: .750 Low-profile Gas Block
Muzzle Device: A2 Flash Hider
Upper Receiver Material: Forged 7075 T6
Upper Receiver Style: M4 Mil-Std
Upper Receiver Finish: Type III Anodizing
Forward Assist: Yes
Dust Cover: Yes
Handguard Type: Free Float
Handguard Style: M-Lok Thin Rail
Handguard Length: 10"