{"product_id":"faxon-firearms-duty-series-gunner-5-56-nato-13-9-mid-length-ar-15-barrel-15a58m139ngq","title":"FAXON FIREARMS Duty Series Gunner 5.56 NATO 13.9\" Mid-Length AR-15 Barrel 15A58M139NGQ","description":"Product Description\n\u003cp\u003eThe Faxon Firearms Duty Series Gunner Profile 13.9\" Barrel in 5.56 NATO delivers a precise blend of the two most time-tested AR-15 barrel contours: the Government and the Pencil. By merging the Government profile's durability behind the gas block with the Pencil profile's weight savings toward the muzzle, Faxon's Gunner design shifts the rifle's center of gravity rearward - reducing front-end fatigue and enhancing control during extended sessions of shooting, training, or hunting. At 13.9\", this barrel is purpose-built for pin-and-weld configurations that achieve a legal 16\" overall length once a muzzle device is permanently attached. Manufactured in-house in Cincinnati, Ohio, each barrel starts as certified 4150 CMV Mil-Spec steel, button-rifled with a 1:8 twist, and then fully stress relieved, air-gauge tested, and magnetic particle inspected before receiving a durable black nitride finish applied both inside and out for exceptional corrosion and wear resistance. An 11-degree target crown and precision PTG headspace gauging round out the quality process, ensuring consistent, reliable accuracy shot after shot.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHybrid Gunner Contour:\u003c\/strong\u003e Combines Government profile durability with Pencil profile weight savings for a fast-handling, fatigue-reducing balance point ideal for duty, competition, and recreational AR-15 builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin-and-Weld Ready at 13.9\":\u003c\/strong\u003e Designed for permanent muzzle device attachment to meet the 16\" legal minimum for non-National Firearms Act rifles, making this a versatile choice for compliant carbine builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMid-Length Gas System:\u003c\/strong\u003e Provides a smoother, softer recoil impulse and extended gas dwell time compared to carbine-length systems, improving reliability for both suppressed and unsuppressed setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4150 CMV Steel with Black Nitride Finish:\u003c\/strong\u003e Button-rifled from certified 4150 Chrome Moly Vanadium steel and treated with a salt bath nitride finish inside and out, delivering superior hardness, corrosion resistance, and long-term durability without chrome lining.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRigorous Quality Control:\u003c\/strong\u003e Every barrel is fully stress relieved, air-gauge tested, magnetic particle inspected, and individually checked for headspace with precision PTG gauges, then finished with an 11-degree target crown for superior accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e FAXON FIREARMS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Duty Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel \/ Profile:\u003c\/strong\u003e Gunner (Government \/ Pencil blend)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56 NATO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 13.9\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas System:\u003c\/strong\u003e Mid-Length\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Block Diameter:\u003c\/strong\u003e .625\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Block Journal Length:\u003c\/strong\u003e 1.9\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 4150 CMV (Chrome Moly Vanadium)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Type:\u003c\/strong\u003e Button Rifled\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Nitride (inside and out)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMuzzle Thread:\u003c\/strong\u003e 1\/2-28 TPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Extension:\u003c\/strong\u003e M4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrown:\u003c\/strong\u003e 11-Degree Target Crown\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFirearm Fit:\u003c\/strong\u003e AR-15\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.26 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Manufacture:\u003c\/strong\u003e USA (Cincinnati, Ohio)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e 15A58M139NGQ\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 816341026568\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eDisclaimer: 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.\u003c\/em\u003e\u003c\/p\u003e\n]]\u0026gt;","brand":"FAXON FIREARMS","offers":[{"title":"Default Title","offer_id":44199863844986,"sku":"FLX-169224","price":175.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/297589897.png?v=1788383226","url":"https:\/\/tlooutdoors.com\/products\/faxon-firearms-duty-series-gunner-5-56-nato-13-9-mid-length-ar-15-barrel-15a58m139ngq","provider":"TLO Outdoors","version":"1.0","type":"link"}