Product Description The PROOF Research PR-15 Carbon Fiber Wrapped Barrel in 6mm Advanced Rifle Cartridge (6mm ARC) delivers precision-grade performance in a lightweight, durable package designed for the AR-15 platform. Featuring a 14.5-inch barrel length and a 1:7.5 inch twist rate, this barrel is engineered to maximize accuracy and ballistic efficiency with 6mm ARC ammunition. The PXT (carbon fiber wrapped) construction significantly reduces weight compared to traditional steel barrels while maintaining exceptional rigidity and heat dissipation, making it an ideal upgrade for shooters who demand performance without the added bulk. PROOF Research is renowned for its aerospace-grade manufacturing standards, and this barrel reflects their commitment to precision and quality. Product Highlights 6mm ARC Chambering: Optimized for the 6mm Advanced Rifle Cartridge, delivering outstanding long-range ballistics and terminal performance from an AR-15 platform. Carbon Fiber Wrapped (PXT) Construction: PROOF Research&';s proprietary carbon fiber wrap dramatically reduces barrel weight while improving stiffness and thermal stability for consistent shot-to-shot accuracy. 14.5-Inch Barrel Length: Compact yet capable barrel profile ideal for tactical and precision applications requiring maneuverability without sacrificing velocity. 1:7.5 Inch Twist Rate: Precisely engineered twist rate stabilizes a wide range of 6mm ARC projectiles for maximum accuracy and versatility. Aerospace-Grade Manufacturing: Built to PROOF Research&';s exacting standards, ensuring superior durability, longevity, and consistent performance in demanding conditions. Specs Brand: PROOF RESEARCH Model: PR-15 Caliber/Chambering: 6mm ARC (Advanced Rifle Cartridge) Barrel Length: 14.5 inches Twist Rate: 1:7.5 inches Construction: PXT Carbon Fiber Wrapped Platform: AR-15 Manufacturer Part Number (MPN): 152232 UPC: 843068152232 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. ]]>