Ballistic Advantage 17.7" 5.56 BA Hanson (3-Gun) Midlength Performance Series Barrel w/ Pinned Lo Pro Gas Block

Ballistic Advantage 17.7" 5.56 BA Hanson (3-Gun) Mid-length Performance Series Barrel w/ Pinned Lo Pro Gas BlockThis 5.56 chambered 17.7 inch Performance Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish. Our Performance Series barrels feature a FailZero Nickel Boron Coated Extended M4 Feed Ramp Extension.Hanson Series Barrels feature our proprietary BA Hanson profile and include a pinned lo-pro gas block. Hanson barrels are not designed to work with aftermarket piston kits.Additional Info:Length: 17.7"Material: 4150 Chrome Moly VanadiumProfile: HansonFinish: QPQ Corrosion ResistantGas System Length: Mid-LengthGas Block Journal: .750"Twist Rate: 1:7 inchesMuzzle: 1/2x28 ThreadedWeight: 31ozOther Info: HP and MPI Tested