Product Description The LUTH-AR BL-F11-7 is an 11.5 inch AR-15 barrel chambered in 5.56 mm, built with a Government profile and a durable manganese phosphate (mag phosphate) finish. Designed for compact builds, it features a front sight base for quick sighting and a 1:7 twist rate suitable for a wide range of bullet weights. Constructed from 4150 chrome moly vanadium (CMV) steel and equipped with an M4 barrel extension, it is a solid choice for dependable performance in a short-barreled setup. Product Highlights 11.5 inch Government profile AR-15 barrel in 5.56 mm for compact builds 1:7 twist rate supports many common 5.56 mm projectile weights 4150 CMV steel construction with manganese phosphate (mag phosphate) finish for durability Front sight base installed for traditional sighting setups and easy alignment M4 barrel extension for compatibility with standard AR-15 upper assemblies Specs Brand: LUTH-AR Manufacturer Part Number: BL-F11-7 UPC: 812058031703 Caliber: 5.56 mm Barrel Length: 11.5 in Profile: Government Profile Twist Rate: 1:7 Material: 4150 CMV (not chrome lined) Finish: Mag Phosphate (manganese phosphate) Sight Base: Front sight base installed Extension: M4 barrel extension Included Parts Note: Does not include front sight post, spring, and detent Disclaimer: 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.