Criterion Stainless Steel (Nitrided) AR-15 HBAR contour barrels feature a gas port drilled for a .750 gas block. An indent is provided opposite the gas port to enable easy installation. Also included is an M4 barrel extension. These barrels accept muzzle devices with a 1/2x28 thread. Chambers are finished, but barrels should be headspaced and installed by a qualified gunsmith prior to use.
- Barrel Length: 20"
- Twist: 1-8 RH
- Chamber: .223 Wylde (.223 Rem/ 5.56x45mm NATO)
- Gas System: Rifle
- Gas Block Diameter: .750"
- Weight: 2.80 lbs
- Finish: Stainless Steel (Nitrided)
- Threads: 1/2x28