--- title: "Rosco Manufacturing 12.5\" M4 5.56 NATO Barrel" description: "Black 12.5\" M4 barrel chambered in 5.56 NATO, with a carbine configuration designed to fit AR-15 platforms and support SBR or pistol builds." canonical_url: "https://www.kygunco.com/product/rosco-manufacturing-m4-barrel-5.56-nato-12.5-carbine-fits-ar-15-black" meta: author: KYGUNCO "og:description": "Black 12.5\" M4 barrel chambered in 5.56 NATO, with a carbine configuration designed to fit AR-15 platforms and support SBR or pistol builds." "og:image": "https://cdn.kygunco.com/assets/products/272452/thumbnail.jpg?v=1733338240" "og:image:height": "500" "og:image:width": "500" "og:title": "Rosco Manufacturing 12.5\" M4 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-BL-125-M4-556-7-C ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/272452/main.jpg?v=1733338240) For illustration purposes only, this image may not be an exact representation of the product. # ROSCO MANUFACTURING M4 Barrel 5.56 NATO 12.5" Carbine fits AR-15 Black Rosco Manufacturing Bloodline M4 barrel with a 12.5-inch length, 5.56 NATO chambering, carbine configuration, and black finish. Designed to fit AR-15 platforms and suited for SBR or pistol builds. $148.99 ** 5 interest-free payments of **$29.80** 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 # 272452 Style RSC-BL-125-M4-556-7-C UPC 181969500036 Condition New Manufacturer [Rosco Manufacturing](https://www.kygunco.com/brand/rosco-manufacturing) Weight 4 lb This Rosco 12.5" M4 5.56 NATO Bloodline Barrel is designed to be the perfect addition to any SBR or Pistol build. The Rosco 5.56 (NATO) barrels are designed to meet the modern day carbine shooters requirements. They are a long way from their daddy's Sporter AR, and those specs just won't cut it anymore. From properly managed dwell times for SBR's, to running Suppressed, or setting up a balanced patrol carbine they have incorporated your needs into their engineering. They have successfully accomplished this by picking the right twist rates, gas port diameters, and barrel materials according to the barrel they are making (not a lazy blanket method). They have also balanced input from their consumers and military end users in order to bring you the product you need, not just the one they want to sell you. 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-m4-barrel-5.56-nato-12.5-carbine-fits-ar-15-black#webpage","@type":"WebPage","description":"Black 12.5\" M4 barrel chambered in 5.56 NATO, with a carbine configuration designed to fit AR-15 platforms and support SBR or pistol builds.","name":"Rosco Manufacturing 12.5\" M4 5.56 NATO 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