Product Description The PROOF RESEARCH PR15 in 6mm ARC (Advanced Rifle Cartridge) is a precision-engineered, carbon fiber wrapped barrel designed for the AR-15 platform. Measuring 20 inches in length with a 1:7.5 twist rate, this barrel is built to deliver exceptional accuracy and performance at long range. The PXT designation refers to PROOF RESEARCH&';s proprietary carbon fiber wrapping process, which bonds aerospace-grade carbon fiber directly to a steel core - dramatically reducing weight without sacrificing rigidity or durability. Whether used for precision competition or field shooting, this barrel represents the pinnacle of modern rifle barrel technology. Product Highlights Carbon Fiber Wrapped PXT Construction: PROOF RESEARCH&';s carbon fiber over steel core technology delivers a lightweight, rigid barrel that outperforms traditional steel barrels in both accuracy and heat dissipation. 6mm ARC Chambering: Optimized for the 6mm Advanced Rifle Cartridge, offering excellent long-range ballistics and compatibility with the AR-15 platform. 20-Inch Barrel Length: Maximizes muzzle velocity and long-range performance while maintaining compatibility with standard AR-15 rifle-length configurations. 1:7.5 Twist Rate: Ideal for stabilizing a wide range of 6mm ARC projectile weights, including heavier match-grade bullets for precision shooting. Precision Performance: Built to PROOF RESEARCH&';s industry-leading tolerances, this barrel is trusted by military, law enforcement, and competitive shooters worldwide. Specs Brand: PROOF RESEARCH Model: PR15 MPN: 152195 UPC: 843068152195 Caliber: 6mm ARC (Advanced Rifle Cartridge) Barrel Length: 20 inches Twist Rate: 1:7.5 Construction: Carbon Fiber Wrapped (PXT) Platform: AR-15 (PR15) Weight: 2.71 lbs Package Width: 3.6 in Package Length: 25.1 in Package Height: 3.2 in 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. ]]>