Product DescriptionThe Faxon Firearms Duty Series Gunner Profile 11.5 inch 5.56 NATO barrel is built for lightweight AR-15 builds that still need long-term durability, including suppression-focused setups. Its Gunner contour uses a Government-style taper behind the gas block for strength where it counts, then transitions to a straight forward section with a full shoulder and standard 1/2-28 muzzle threads for secure muzzle device and suppressor mounting. Manufactured in-house from certified 4150 CMV steel and finished in black nitride inside and out, this barrel is fully stress relieved, air-gauge tested, and individually headspace checked for consistent performance.Product Highlights Lightweight Gunner profile design helps reduce front-end weight while maintaining structural integrity. Black nitride finish inside and out enhances corrosion resistance and long-term wear durability. Button-rifled 1:8 twist rifling offers versatile performance across common 5.56 NATO projectile weights. Mid-length gas system on an 11.5 inch barrel supports balanced function for compact builds. Quality control includes stress relief, air-gauge testing, magnetic particle inspection, and headspace verification.Specs Brand: Faxon Firearms Manufacturer Part Number: 15A58M11NGQ UPC: 816341020016 Caliber: 5.56 NATO Barrel Length: 11.5 inch Gas System: Mid-length Barrel Profile: Gunner (Government taper behind gas block; straight to full shoulder) Material: 4150 CMV steel Rifling: Button rifled Twist Rate: 1:8 Finish: Black Nitride (inside and out) Muzzle Threads: 1/2-28 TPI Gas Block Diameter: 0.625 inch Gas Block Journal Length: 1.7 inch Barrel Extension: M4 Crown: 11 degree target crown Weight: Approx. 1.14 lb Inspection and QC: Stress relieved, air-gauge tested, magnetic particle inspected, headspace checkedDisclaimer: 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.