{"product_id":"rosco-manufacturing-k9-ar-15-5-56-nato-11-5-stainless-steel-barrel-nitride","title":"Rosco Manufacturing K9 AR-15 5.56 NATO 11.5\" Stainless Steel Barrel - Nitride","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eRosco Manufacturing K9 11.5\" barrel\u003c\/span\u003e\u003c\/strong\u003e is an \u003cstrong\u003eAR-platform\u003c\/strong\u003e barrel chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56 NATO\u003c\/span\u003e\u003c\/strong\u003e. Developed and tested with Jon Dufresne of Kinetic Consulting, this Duffy Spec configuration is intended for compact, hard-use builds and is designed to operate suppressed or unsuppressed.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e11.5 in\u003c\/strong\u003e barrel is made from \u003cstrong\u003e416R stainless steel\u003c\/strong\u003e and features a \u003cstrong\u003enitride finish\u003c\/strong\u003e, including a nitride-finished barrel extension. Its \u003cstrong\u003econtinuous taper profile\u003c\/strong\u003e shifts mass rearward to improve balance when a light, suppressor, or other accessories are mounted forward. A \u003cstrong\u003e1:7 twist\u003c\/strong\u003e, \u003cstrong\u003e1\/2x28\u003c\/strong\u003e muzzle threads, \u003cstrong\u003e0.750 in gas-block journal\u003c\/strong\u003e, and recessed target crown derived from the Purebred series round out the barrel's core specifications.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe K9 uses Rosco's proprietary \u003cstrong\u003epatrol-length direct-gas-system\u003c\/strong\u003e configuration with an optimized gas port. A \u003cstrong\u003epatrol-length gas tube\u003c\/strong\u003e is included. Rosco recommends using a handguard at least \u003cstrong\u003e10 in\u003c\/strong\u003e long for installation.\u003c\/span\u003e\u003c\/p\u003e","brand":"Rosco Manufacturing","offers":[{"title":"Default Title","offer_id":54988428640578,"sku":"179482","price":158.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_7ddbc901-eaeb-4279-baa1-5ddf258aa07d.png?v=1784135273","url":"https:\/\/centerfiresystems.com\/products\/rosco-manufacturing-k9-ar-15-5-56-nato-11-5-stainless-steel-barrel-nitride","provider":"Centerfire Systems","version":"1.0","type":"link"}