Product DescriptionThe Ballistic Adv Performance Series BA Hanson AR-15 barrel is built for compact 5.56x45mm NATO setups where reliability and durability matter. Machined from 4150 Chrome Moly Vanadium steel and treated with a black QPQ corrosion-resistant finish, this 10.3-inch carbine-length barrel features Ballistic Advantage's BA Hanson profile for a balanced feel. It includes a pinned low-profile gas block and uses a Nickel Boron-coated M4 feed ramp extension to support smooth feeding. This barrel is not designed for use with aftermarket piston kits.Product Highlights 10.3 in 5.56x45mm NATO BA Hanson profile barrel for AR-15 builds (accepts .223 Remington) 4150 Chrome Moly Vanadium steel with black QPQ (Quench-Polish-Quench) corrosion-resistant finish Carbine-length gas system with pinned low-profile gas block; .750 in gas block journal compatibility Nickel Boron-coated M4 feed ramp extension for dependable feeding Threaded muzzle (1/2x28) and 1:7 twist rate; marked HP/MPI on barrelSpecs Brand: Ballistic Adv Manufacturer Part Number: BABL556004F UPC: 819747020680 Platform: AR-15 Caliber: 5.56x45mm NATO (accepts .223 Remington) Barrel Length: 10.3 in Series: Performance Series Profile: BA Hanson Gas System Length: Carbine Material: 4150 Chrome Moly Vanadium (CMV) Finish: Black QPQ Twist Rate: 1:7 Muzzle Threads: 1/2x28 Gas Block Journal: .750 in (low-profile gas blocks) Included: Pinned low-profile gas blockDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.