Cobalt Kinetics Complete Upper 13.7 – Black

This 13.7” Rosco barrel is the perfect option for an evenly capable SBR/ RECCE build. It is designed to give the shooter maneuverability at close quarters yet allow them to get first round impact hits as far as 300 yards. The gas system has been designed to give the platform a non-turbulent operation while not sacrificing proper dwell times. This barrel is perfectly suited for your next expeditionary/ entry rifle build. ALL NFA RULES APPLY!

Rosco Manufacturing’s “Purebred” series is a testament to precision and quality manufacturing. We took a step back to see how we could create a barrel line that would be a culmination of all the lessons learned through years of making barrels for several OEM’s. The result is a barrel that will produce results out of the box for any shooter that is looking to take their skills above and beyond. All of our Purebred barrels are made from scratch in our Rhode Island facility and start life as a blank piece of 416R stainless steel.

Aside from making our own barrel blanks, and barrel extensions, we also hold ourselves to the most stringent quality standards. This is the only way that we can make sure that we are producing a product that will perform time after time under the demanding of situations. We are setting out to re-define the rules and we plan on letting our work do the talking…

• Barrel Length: 13.7″
• Barrel Weight: 23.6oz
• Barrel Material: 416 R
• Barrel Caliber: .223 Wylde
• Barrel Profile: Government
• Twist: 1/8
• Barrel Thread: 1/2 x 28
• Gas Block Size: .750
• Gas System Length: Midlength
• Barrel Crown: Step Crown
• Barrel Finish: 80 Grit Bead Blast
• Barrel Extension Finish: Nickel Boron