Rosco Manufacturing 18″ .223 Wylde Purebred Barrel (1/7 Twist)


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SKU: PB-18-MED-223W-7-R

Product Description

Purebred – 18″ .223 Wylde Barrel: This Rosco 18″ .223 Wylde Barrel was made to enhance the performance of the original MK12 SPR. The medium contour is well suited for cold bore shots on target as well as keeping the weight at a great balance. Gas ports were sized according to the most popular precision bullet weights and suppressor use.

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 18.0″
Barrel Weight 30.15 oz
Barrel Material 416 R
Barrel Caliber .223 Wylde
Barrel Profile




Barrel Thread

1/2 x 28

Barrel Gas Block Size


Gas System Length

Barrel Crown

Step Crown

Barrel Finish

80 Grit Bead Blast

Barrel Extension Finish

Nickel Boron





Technical Information

Barrel Twist



.223 Wylde

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit