{"product_id":"faxon-firearms-duty-series-5-56-nato-16-1-7-twist-chrome-lined-m4-ar-15-barrel-chrome-mag-phosphate","title":"Faxon Firearms Duty Series 5.56 NATO 16\" 1:7 Twist Chrome Lined M4 AR-15 Barrel - Chrome Mag Phosphate","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eFaxon Firearms Duty Series 16\" 5.56 NATO\u003c\/span\u003e\u003c\/strong\u003e barrel is a Mil-Spec M4-profile upgrade for any AR-15 build. Machined from \u003cstrong\u003e4150 CMV\u003c\/strong\u003e steel and finished with a \u003cstrong\u003echrome-lined\u003c\/strong\u003e bore and \u003cstrong\u003eChrome Mag Phosphate\u003c\/strong\u003e exterior, this barrel is built to handle hard use and extended firing schedules while meeting the dimensional standards of the original military M4 carbine.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003ebutton-rifled\u003c\/strong\u003e bore features a \u003cstrong\u003e1:7\"\u003c\/strong\u003e twist rate, the military standard for stabilizing the full range of \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56 NATO\u003c\/span\u003e\u003c\/strong\u003e projectiles. The \u003cstrong\u003eM4 contour\u003c\/strong\u003e measures \u003cstrong\u003e0.750\"\u003c\/strong\u003e under the handguard and pairs with standard carbine handguards, while the \u003cstrong\u003ecarbine-length\u003c\/strong\u003e gas system keeps the operating impulse tame for reliable function with both commercial and Mil-Spec bolt carrier groups.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eChrome lining on the bore gives the grooves a hard, corrosion-resistant surface that shrugs off heat and fouling, while the black \u003cstrong\u003ephosphate\u003c\/strong\u003e exterior finish matches a Mil-Spec build and is fully compatible with standard AR-15 barrel nuts, gas blocks, and free-float handguards.\u003c\/span\u003e\u003c\/p\u003e","brand":"Faxon Firearms","offers":[{"title":"Default Title","offer_id":55086980694338,"sku":"173810","price":217.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_e04ab45d-ae09-42ca-8c7b-bce5320df0e1.png?v=1784771896","url":"https:\/\/centerfiresystems.com\/products\/faxon-firearms-duty-series-5-56-nato-16-1-7-twist-chrome-lined-m4-ar-15-barrel-chrome-mag-phosphate","provider":"Centerfire Systems","version":"1.0","type":"link"}