--- title: "Rosco Manufacturing K9 11.5\" 5.56 NATO Barrel" description: "Black 11.5\" 5.56 NATO barrel for AR-15 platforms with a patrol-length gas system and optimized gas port for suppressed or unsuppressed operation." canonical_url: "https://www.kygunco.com/product/rosco-manufacturing-k9-barrel-5.56-nato-11.5-patrol-fits-ar-15-black" meta: author: KYGUNCO "og:description": "Black 11.5\" 5.56 NATO barrel for AR-15 platforms with a patrol-length gas system and optimized gas port for suppressed or unsuppressed operation." "og:image": "https://cdn.kygunco.com/assets/products/272459/thumbnail.jpg?v=1733338659" "og:image:height": "500" "og:image:width": "500" "og:title": "Rosco Manufacturing K9 11.5\" 5.56 NATO Barrel" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Gun Parts](https://www.kygunco.com/category/shooting/gun-parts) / [Handgun & Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts) / [Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts) / [Rifle Barrels](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts/rifle-barrels) / RSC-K9-115-HY-DUFFY-556-7- ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/272459/main.jpg?v=1733338659) For illustration purposes only, this image may not be an exact representation of the product. # ROSCO MANUFACTURING K9 Barrel 5.56 NATO 11.5" Patrol fits AR-15 Black The Rosco Manufacturing K9 is a black 11.5" 5.56 NATO barrel for AR-15 platforms. It uses a proprietary patrol-length gas system, an optimized gas port for suppressed or unsuppressed operation, and a continuous-taper profile designed to dissipate heat. An updated target crown supports improved harmonics and finish. $174.99 ** 5 interest-free payments of **$35** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Handled by our expert shippers in Bardstown, KY. Item # 272459 Style RSC-K9-115-HY-DUFFY-556-7- UPC 850039693083 Condition New Manufacturer [Rosco Manufacturing](https://www.kygunco.com/brand/rosco-manufacturing) Weight 4 lb The K9 11.5 offers a proprietary patrol length gas system that is smoother than carbine length, more reliable than mid-length. Features an optimized gas port to run reliably suppressed and/or unsuppressed. The K9 continuous taper is the most effective profile to dissipate heat from hard use. With weight shifted to the back of the barrel, modern attachments on the front of the rifle create a perfectly balanced and better handling rifle. Updated target crown carried over from the Purebred series with improved harmonics, fit and finish Shop with KYGUNCO for the best selection, competitive pricing, and exceptional customer service. Experience the difference that comes with buying from a trusted outdoor retailer with over 20 years of experience in the industry. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from Rosco Manufacturing ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/rosco-manufacturing-k9-barrel-5.56-nato-11.5-patrol-fits-ar-15-black#webpage","@type":"WebPage","description":"Black 11.5\" 5.56 NATO barrel for AR-15 platforms with a patrol-length gas system and optimized gas port for suppressed or unsuppressed operation.","name":"Rosco Manufacturing K9 11.5\" 5.56 NATO 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