Product DescriptionUpgrade your AR-15 with the Ballistic Advantage Performance Series BA Hanson Mid-Length barrel, chambered in 5.56x45mm NATO and built for reliable function and consistent accuracy in a compact 13.9-inch package. Machined from durable Chrome Moly Vanadium (CrMoV/4150 CMV) steel and treated with a corrosion-resistant Black QPQ finish, this barrel is designed for hard use and long service life. It also features a Nickel Boron coated extended M4 feed ramp extension to promote smooth feeding, along with a mid-length gas system for balanced cycling and shootability. The threaded muzzle supports common AR-15 muzzle devices for easy customization.Product Highlights 13.9-inch 5.56x45mm NATO BA Hanson-profile barrel for a maneuverable AR-15 build CrMoV/4150 Chrome Moly Vanadium steel construction with durable Black QPQ finish Mid-length gas system helps deliver smoother cycling and reduced recoil impulse Nickel Boron coated extended M4 feed ramp extension supports reliable feeding Threaded muzzle (1/2x28) for popular AR-15 compensators, flash hiders, and suppressor mountsSpecs Brand: Ballistic Advantage Series/Model: Performance Series (BA Hanson) Caliber/Chamber: 5.56x45mm NATO Barrel Length: 13.9 in Firearm Fit: AR-15 Gas System Length: Mid-Length Material: Chrome Moly Vanadium (CrMoV / 4150 CMV) steel Finish: Black QPQ (corrosion-resistant) Muzzle Threads: 1/2x28 Twist Rate: 1:7 Feed Ramps: Nickel Boron coated extended M4 feed ramp extension Approx. Weight: 1.62 lb UPC: 819747020840 Manufacturer Part Number: BABL556037FDisclaimer: 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 products manufacturer.