This Rosco 13.9" .223 Wylde Barrel was designed for the modern shooters desire for precision in a small package. The SPR profile is well suited for cold bore shots on target with a balanced rifle.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... NOTE: Serves as an HBAR or Heavy Barrel for restrictive states. Barrel Length 13.9" Barrel Weight oz Barrel Material 416 R Barrel Caliber .223 Wylde Barrel Profile SPR Twist 1/7 Barrel Thread 1/2 x 28 Barrel Gas Block Size 0.750 Gas System Length Mid-Length Barrel Crown Step Crown Barrel Finish 80 Grit Bead Blast Barrel Extension Finish Nickel Boron