Product Description The Rosco Manufacturing Purebred 20" 6mm ARC barrel is precision-engineered to maximize the performance potential of the 6mm ARC cartridge. Built from stainless steel and finished in a durable Nickel Boron coating, this barrel features an SPR contour that strikes an ideal balance between weight efficiency and thermal management, making it particularly well-suited for cold bore precision shots on target. Gas ports have been carefully sized to accommodate the most popular precision bullet weights and suppressed use, while the Rifle +1 gas system ensures reliable cycling across a wide range of loads. Whether you are building a dedicated precision rifle or a versatile mid-range shooter, the Purebred barrel delivers the accuracy and reliability that Rosco Manufacturing is known for. Product Highlights 6mm ARC Optimized: Purpose-built to unlock the full ballistic potential of the 6mm ARC cartridge for precision long-range applications. SPR Contour: The Special Purpose Rifle contour provides an excellent weight-to-stiffness ratio, ideal for cold bore accuracy and extended shooting sessions. Nickel Boron Finish: A corrosion-resistant Nickel Boron coating over a stainless steel substrate ensures lasting durability and easy maintenance. Precision-Sized Gas Ports: Gas ports are matched to popular precision bullet weights and suppressor use for consistent, reliable cycling. Rifle +1 Gas System: The extended Rifle +1 gas system promotes smooth, controlled cycling and reduced felt recoil for improved follow-up shot accuracy. Specs Brand: Rosco Manufacturing Model: Purebred Caliber: 6mm ARC Barrel Length: 20" Contour: SPR Material: Stainless Steel Finish: Nickel Boron Twist Rate: 1:7.5" Gas System: Rifle +1 MPN: PB-20-SPR-6MM-7.5-R1 UPC: 850039693328 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>