The Proof Bbl Cf Blank Bolt .224 Sendero 16.5 1-7 from Proof Research delivers a precision-focused rifle barrel solution designed for demanding shooters who demand consistency and exceptional performance, featuring a .224 caliber with a 16.5-inch barrel length and a tight 1-7 twist that excels with precision loads. Built with a Sendero contour for improved rigidity and heat management, this barrel balances handling and stability while maintaining a compact profile ideal for tactical, varmint, and long-range hunting applications. The bores breech measures 2.5 and the shank diameter is 1.20, details that contribute to repeatable lockup and dependable chambering when paired with compatible action components. Weighing just 2lbs-8oz, it provides a notable reduction in overall rifle weight without sacrificing accuracy or stiffness, making it a practical upgrade for rifle enthusiasts seeking enhanced ballistic uniformity and quicker track while varminting or target shooting. Reliability, rugged construction, and a true match to the Proof Research lineage ensure this barrel delivers consistent performance across sessions, helping shooters achieve tighter groups and more predictable windage adjustments at extended ranges.