Product Description The Proof Research PR-15 barrel in 223 Wylde is an elite-grade, carbon fiber wrapped rifle barrel engineered for AR-15 platform builds demanding the highest levels of accuracy, durability, and weight savings. Chambered in the versatile 223 Wylde, this barrel is capable of safely firing both .223 Remington and 5.56 NATO ammunition while maintaining exceptional precision. At 11.5 inches in length, this barrel is purpose-built for compact, short-barreled rifle configurations. The 5/8-24 muzzle thread accommodates a wide range of suppressors and muzzle devices, while the 1:7 twist rate stabilizes a broad spectrum of modern projectiles including heavier-grain bullets. Proof Research&';s proprietary carbon fiber wrapping process dramatically reduces barrel weight compared to traditional steel barrels while simultaneously improving heat dissipation during sustained fire, making this barrel a top choice for competitive shooters, law enforcement, and serious enthusiasts. Product Highlights 223 Wylde Chamber: Accepts both .223 Remington and 5.56 NATO ammunition for versatile, accurate performance. Carbon Fiber Wrapped Construction: Significantly reduces overall barrel weight while enhancing heat dissipation and maintaining rigidity. 11.5" Barrel Length: Compact profile ideal for short-barreled rifle (SBR) and close-quarters AR-15 builds. 5/8-24 Muzzle Thread: Compatible with a wide variety of suppressors, muzzle brakes, and compensators. 1:7 Twist Rate: Optimized for stabilizing heavier-grain projectiles for superior downrange accuracy and terminal performance. Specs Brand: Proof Research Model: PR-15 Chamber: 223 Wylde Barrel Length: 11.5" Muzzle Thread: 5/8-24 Twist Rate: 1:7 Construction: Carbon Fiber Wrapped Platform: AR-15 (PR-15) MPN: 143216 UPC: 843068143216 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. ]]>