{"product_id":"fn-america-ar-15-18-inch-m16-contour-5-56-nato-rifle-length-gas-chrome-lined-barrel-20-100042","title":"FN America AR-15 18 Inch M16 Contour 5.56 NATO Rifle-Length Gas Chrome-Lined Barrel 20-100042","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe FN America AR-15 premium button rifled barrel is built to military specifications for dependable accuracy, long service life, and hard-use reliability. Manufactured from U.S.-sourced Chrome Moly Vanadium steel (Mil-B-11595E), each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to help ensure consistent quality and structural integrity. A chrome-lined bore and chamber improve corrosion resistance and reduce heat erosion for extended barrel life, while M4-style feed ramps support smooth, reliable feeding. Finished in a matte black manganese phosphate coating for external corrosion resistance, this 18-inch, rifle-length gas barrel is a strong choice for precision-focused AR-15 builds.\u003c\/p\u003e\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e18-inch 5.56 NATO AR-15 barrel with rifle-length gas system for smooth cycling and controllable recoil impulse\u003c\/li\u003e\n  \u003cli\u003eChrome Moly Vanadium steel construction made to Mil-B-11595E standards for durability and performance\u003c\/li\u003e\n  \u003cli\u003eChrome-lined bore and chamber enhance corrosion resistance and extend barrel life\u003c\/li\u003e\n  \u003cli\u003eHPT and MPI inspected to verify integrity and help eliminate micro-stresses or manufacturing flaws\u003c\/li\u003e\n  \u003cli\u003eM4-style feed ramps and matte black manganese phosphate finish for reliable operation and corrosion protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBrand: FN America\u003c\/li\u003e\n  \u003cli\u003eManufacturer Part Number: 20-100042\u003c\/li\u003e\n  \u003cli\u003eUPC: 845737008468\u003c\/li\u003e\n  \u003cli\u003eCaliber: 5.56 NATO\u003c\/li\u003e\n  \u003cli\u003eBarrel Length: 18 in\u003c\/li\u003e\n  \u003cli\u003eGas System Length: Rifle-Length\u003c\/li\u003e\n  \u003cli\u003eBarrel Contour\/Profile: M16 Profile\u003c\/li\u003e\n  \u003cli\u003eRifling Method: Button rifled \/ button broached\u003c\/li\u003e\n  \u003cli\u003eTwist Rate: 1:7\u003c\/li\u003e\n  \u003cli\u003eBore \u0026amp; Chamber: Chrome-lined\u003c\/li\u003e\n  \u003cli\u003eMaterial: Chrome Moly Vanadium steel\u003c\/li\u003e\n  \u003cli\u003eFeed Ramps: M4 style\u003c\/li\u003e\n  \u003cli\u003eFinish: Matte black manganese phosphate\u003c\/li\u003e\n  \u003cli\u003eTesting: High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI)\u003c\/li\u003e\n  \u003cli\u003eMuzzle Threads: 1\/2x28\u003c\/li\u003e\n  \u003cli\u003eGas Block Journal Diameter: .750\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ci\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 products manufacturer.\u003c\/i\u003e\u003c\/p\u003e","brand":"FN America","offers":[{"title":"Default Title","offer_id":44077316046970,"sku":"FLX-FN20-100042","price":266.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/283688430.jpg?v=1767662820","url":"https:\/\/tlooutdoors.com\/products\/fn-america-ar-15-18-inch-m16-contour-5-56-nato-rifle-length-gas-chrome-lined-barrel-20-100042","provider":"TLO Outdoors","version":"1.0","type":"link"}