Overview: The Model 597™ is easily the most advanced autoloading rimfire rifle ever built, and the most technologically advanced breakthrough in autoloading rimfire rifle technology in 35 years. The difference starts with our proprietary bolt-guidance system, which features a unique set of twin tool-steel guide rails for better stability, feeding reliability and greater out-of-the-box accuracy. Of course, we didn’t stop there. The bolt, hammer and sear of the Model 597™ all feature an exclusive nickel-Teflon® plating for smooth, dependable operation and an ultra-crisp trigger pull. To assure reliable, long-term accuracy, we’ve also incorporated a unique positive-locking, permanently rigid barrel attachment clamp. Receivers are grooved for standard rimfire mounts and tapped/drilled for Weaver-style bases. Completing the breakthrough design are an innovative last-shot “hold open” magazine feature and our patented, easy-to-use staggered-stack magazine.