Product DescriptionThe Ballistic Advantage Modern Series 14.5" barrel is a 5.56x45mm NATO government-profile, mid-length gas barrel designed for AR-15 style builds. It is machined from 4150 Chrome Moly Vanadium steel and finished with a QPQ corrosion-resistant treatment for durability and easy maintenance. This barrel features a QPQ-coated M4 feed ramp extension and 1/2-28 muzzle threads to accept common 5.56 muzzle devices.NFA/ATF Notice: All NFA/ATF rules apply. You may use this barrel with a lower receiver that is a registered short-barreled rifle (SBR), machine gun, or pistol. Possession of this barrel along with a non-NFA lower receiver is prohibited, except when installed on a pistol configuration firearm.Product Highlights Modern Series 14.5" government-profile AR-15 barrel for lightweight, well-balanced handling 4150 Chrome Moly Vanadium steel construction for strength and long service life QPQ corrosion-resistant finish for enhanced wear resistance and reduced maintenance Mid-length gas system helps deliver smooth cycling and reliable function 1/2-28 threaded muzzle and M4 feed ramp extension for broad parts compatibilitySpecs Brand: Ballistic Adv Manufacturer Part Number: BABL556010M UPC: 819747020055 Cartridge: 5.56x45mm NATO / .223 Remington Barrel Length: 14.5" Gas System Length: Mid-Length Profile: Government Twist Rate: 1:7 Muzzle Threads: 1/2-28 Material: 4150 Chrome Molybdenum Vanadium Steel Finish: QPQ Gas Block Journal: 3/4" Weight: 25 oz Compatibility: Fits AR-15 style rifleDisclaimer: 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.