Rosco K9 11.5″ 5.56 Barrel – Patrol-Length Gas System with Continuous Taper Profile
Features
- 11.5″ barrel chambered in 5.56 NATO
- Proprietary patrol-length gas system for smoother cycling
- Optimized gas port for suppressed and unsuppressed use
- Continuous taper profile improves balance and heat dissipation
- 416R stainless steel construction
- 1:7 twist rate stabilizes a wide range of 5.56 projectiles
- Nitride/Melonite finish for corrosion and wear resistance
- Updated target crown for improved harmonics and consistency
- Includes patrol-length gas tube
The Rosco K9 11.5″ barrel was developed with Kinetic Consulting around a proprietary patrol-length gas system that sits between traditional carbine and mid-length configurations. The result is a smoother recoil impulse than standard carbine setups while maintaining reliable cycling in short-barreled 5.56 platforms.
Its continuous taper profile shifts weight rearward to improve handling and reduce front-end heaviness once lights, suppressors, or other accessories are added. Combined with an optimized suppressor-ready gas port and updated target crown, the K9 is built for hard-use AR-15 setups where balance and reliability matter.
Specifications
- Brand: Rosco Manufacturing
- Model: K9
- MPN: K9-115-HY-DUFFY-556-7-PT
- Caliber: 5.56 NATO
- Barrel Length: 11.5″
- Gas System: Patrol-Length
- Twist Rate: 1:7
- Material: 416R Stainless Steel
- Finish: Nitride / Melonite
- Thread Pitch: 1/2×28
- Platform Compatibility: AR-15
What’s Included
- 1x Rosco Manufacturing K9 11.5″ 5.56 Barrel
- 1x Patrol-Length Gas Tube
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.
Rosco Manufacturing Returns & Warranty
- Rosco Manufacturing prides itself on creating a well-made product and taking care of its customers. That being the case we will warranty against any defects stemming from manufacturing, or if you received the incorrect part.
- To be eligible for a return, the customer must contact our Customer Service/ Sales Department and make them aware of the issue first. If the issue is related to a technical matter, we will try and resolve it by troubleshooting before we exchange the product or issue a return/ refund.
- If a return is authorized, we will send a shipping label to the customer to use and send the item back to us. The item must be in the original packaging and have the receipt or proof of purchase in the box.
In the event that you receive a product that you changed your mind about or your build needs have changed, we will extend you the following refund policy:
- The original customer has 30 calendar days to return an item from the date they received it, with no exceptions.
- To be eligible for a return, your item must be unused and in the same condition that you received it.
- The item must be in the original packaging and have the receipt or proof of purchase in the box.
- We ultimately still hold the right to deny a return if terms are not met, or there are other determining factors that prompt us to deny one.
Refunds
- Once we receive the item back, we will inspect it and notify you that we have received the returned item.
- We will immediately notify you of the status of your new product or refund after inspecting the item.
- If your return is approved, we will send you a new product or initiate a refund to your credit card (or original method of payment) minus a 10% restocking fee (depending on the reason for return).
- You should receive the credit within a certain amount of days, depending on your card issuer’s policies.
Contact Details:
- Telephone: 401-228-0120
- Email: sales@roscomanufacturing.com
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
