{"product_id":"fn-20-100042-ar-15-5-56x45mm-nato-18-button-rifled-m16-profile-rifle-length-barrel-chrome-lined","title":"FN 20-100042 AR-15 5.56x45mm NATO 18\" Button Rifled M16 Profile Rifle Length Barrel - Chrome Lined","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eFN 20-100042\u003c\/span\u003e\u003c\/strong\u003e is a factory FN \u003cstrong\u003eAR-15\u003c\/strong\u003e replacement barrel chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56x45mm NATO\u003c\/span\u003e\u003c\/strong\u003e. This genuine \u003cstrong\u003e18\"\u003c\/strong\u003e barrel is cut on the classic \u003cstrong\u003eM16 profile\u003c\/strong\u003e and finished in matte black \u003cstrong\u003eManganese Phosphate\u003c\/strong\u003e for excellent resistance to external corrosion and oxidation.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe bore is \u003cstrong\u003ecold hammer forged\u003c\/strong\u003e from steel and \u003cstrong\u003ebutton rifled\u003c\/strong\u003e for consistent, uniform geometry, then \u003cstrong\u003echrome lined\u003c\/strong\u003e for extended service life and easier cleaning under hard use. A \u003cstrong\u003erifle length\u003c\/strong\u003e gas system is specified, and the barrel is fitted with \u003cstrong\u003eM4-style feed ramps\u003c\/strong\u003e and a barrel extension to promote reliable feeding from the magazine into the chamber.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eBuilt as a direct-fit replacement for an existing AR-15 upper assembly, this FN barrel brings factory-spec quality to a custom build, a parts refresh, or a worn-out replacement.\u003c\/span\u003e\u003c\/p\u003e","brand":"FN","offers":[{"title":"Default Title","offer_id":55101953442114,"sku":"154334","price":244.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_d712576f-c887-40fc-bfab-206ed9098cad.png?v=1784792513","url":"https:\/\/centerfiresystems.com\/products\/fn-20-100042-ar-15-5-56x45mm-nato-18-button-rifled-m16-profile-rifle-length-barrel-chrome-lined","provider":"Centerfire Systems","version":"1.0","type":"link"}