Product Description The Proof Research PR-15 Barrel in 223 Wylde is a precision-engineered rifle barrel built for the AR-15 platform. Measuring 11.5 inches in length, this barrel delivers outstanding accuracy and performance in a compact package. Chambered in the versatile 223 Wylde -- a hybrid chamber capable of handling both .223 Remington and 5.56x45mm NATO ammunition -- it is ideal for competitive shooters, tactical operators, and serious enthusiasts alike. The 5/8-24 threaded muzzle allows for the attachment of muzzle devices such as suppressors and compensators, while the 1:7 twist rate provides excellent stability for a wide range of bullet weights. Crafted with Proof Research&';s exacting quality standards, this barrel is a reliable upgrade for any AR-15 build. Product Highlights 223 Wylde Chamber: Accepts both .223 Remington and 5.56x45mm NATO ammunition for maximum versatility. 11.5" Barrel Length: Compact profile ideal for short-barreled rifle (SBR) configurations and close-quarters applications. 5/8-24 Threaded Muzzle: Compatible with a wide variety of muzzle devices, including suppressors, flash hiders, and muzzle brakes. 1:7 Twist Rate: Optimized for stabilizing heavier projectiles, improving long-range accuracy and consistency. Proof Research Quality: Manufactured to tight tolerances by a trusted leader in precision rifle barrel production. Specs Brand: Proof Research Model: PR-15 Manufacturer Part Number (MPN): 143360 UPC: 843068143360 Chamber: 223 Wylde Barrel Length: 11.5 inches Muzzle Thread Pitch: 5/8-24 Twist Rate: 1:7 Platform: AR-15 (PR-15) 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. ]]>