{"product_id":"rosco-manufacturing-bloodline-ar-15-5-56-nato-16-heavy-barrel-nitride","title":"Rosco Manufacturing Bloodline AR-15 5.56 NATO 16\" Heavy Barrel - Nitride","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eRosco Manufacturing Bloodline 16\" Heavy Barrel\u003c\/span\u003e\u003c\/strong\u003e is a \u003cstrong\u003e5.56 NATO\u003c\/strong\u003e chambered, \u003cstrong\u003eheavy profile\u003c\/strong\u003e drop-in barrel designed for the \u003cstrong\u003eAR-15\u003c\/strong\u003e platform. Cut from \u003cstrong\u003e4150 Chrome Moly Vanadium\u003c\/strong\u003e steel and finished in \u003cstrong\u003eblack Nitride\u003c\/strong\u003e, it is purpose-built to handle sustained fire, hard training cycles, and full-auto use.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e16\" heavy contour\u003c\/strong\u003e adds rigidity and increases thermal mass compared to lighter M4 and government profiles, making this barrel a natural match for duty carbines and hard-use training rifles. The finished barrel weighs approximately \u003cstrong\u003e35.76 oz\u003c\/strong\u003e. A \u003cstrong\u003e1:7\" twist rate\u003c\/strong\u003e stabilizes the full range of \u003cstrong\u003e5.56 NATO\u003c\/strong\u003e projectile weights, from light varmint bullets up through heavy 77gr open-pattern match and duty loads.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis Bloodline is set up for a \u003cstrong\u003ecarbine-length gas system\u003c\/strong\u003e and is threaded \u003cstrong\u003e1\/2x28\u003c\/strong\u003e to accept standard 5.56 muzzle devices. The \u003cstrong\u003eNitride\u003c\/strong\u003e surface treatment hardens both the bore and the exterior for improved corrosion resistance and wear life over traditional phosphate, while keeping the outside profile clean and consistent.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eWhether you are assembling a new hard-use carbine or replacing a worn barrel on an existing \u003cstrong\u003eAR-15\u003c\/strong\u003e, the \u003cstrong\u003eRosco Bloodline 16\" Heavy Barrel\u003c\/strong\u003e delivers the durability and proven geometry that defines the Bloodline line.\u003c\/span\u003e\u003c\/p\u003e","brand":"Rosco Manufacturing","offers":[{"title":"Default Title","offer_id":55817664725314,"sku":"179464","price":169.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_0b2e4dd4-7789-4378-9740-c1d050528a5f.png?v=1786096283","url":"https:\/\/centerfiresystems.com\/products\/rosco-manufacturing-bloodline-ar-15-5-56-nato-16-heavy-barrel-nitride","provider":"Centerfire Systems","version":"1.0","type":"link"}