Rosco Manufacturing has released an 11.5” K9 barrel in Crucible 416R with a nitrided finish. Their proprietary patrol length gas system is claimed to offer a smoother recoil than a carbine length system. They recommend a 10″ minimum length for the handguard. The muzzle thread pitch, if you want to add a suppressor or other muzzle devices is 1/2 x 28.

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Here is the new product release:

October, 2022: Rosco Manufacturing, an American manufacturer of high-quality pistol barrels, rifle barrels, & firearm accessories is proud to announce the launch of their 11.5” K9 barrel. This barrel is sponsored and extensively tested by Jon Dufresne of Kinetic Consulting, a very well-respected industry professional.

The K9 11.5” 5.56 NATO barrel offers a proprietary patrol length gas system that is smoother than carbine length and 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.

Made in the USA, the Rosco way!

About Rosco Manucafturing:

Rosco Manufacturing is an American manufacturer of hard-use precision rifle barrels. Our production facility in Central Falls, RI has over 50,000 square feet of production space with room for high volume capacity. Rosco supplies major gun manufacturers (the world over) with high quality products. Through superior workmanship and unprecedented engineering, our product line continues to exceed expectations and provides a complete solution for the OEM.

The 11.5” K9 barrel should be live and for sale here: Rosco 11.5” K9 barrel, with an MSRP of $165. There are options to add a non-adjustable gas block for an additional $45, or an adjustable one for $150.

What do you think? The perfect barrel for your next build?