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Engineered for precision, stability, and competition-ready performance, this modular chassis system delivers a rock-solid foundation for consistent accuracy shot after shot. Built with a molded one-piece chassis and adjustable buttstock assembly constructed from glass-filled nylon, it provides exceptional strength, rigidity, and long-term durability for demanding shooting applications.
The Quick-Fit Precision Rimfire stock system allows fast, tool-efficient adjustment of length of pull and comb height, ensuring a customized fit for a wide range of shooters, clothing configurations, and shooting positions. Molded-in reference marks make it easy to return to preferred settings with repeatable precision.
A versatile adjustable buttstock includes a flat Picatinny bag rider for secure rear monopod attachment, a molded tether point for squeeze bags, and an integrated metal QD pocket for reliable sling mounting. The system is designed for maximum adaptability in field, range, or competition environments.
Performance-driven features include a Big-Gun bolt throw adjustment system, enabling conversion from a rimfire 1-1/2" bolt throw to a short-action centerfire 3" bolt throw. This reduces short-stroking risk and enhances cycling consistency in high-pressure shooting scenarios.
The Ruger Marksman Adjustable™ trigger offers external adjustment from 2.25 to 5 pounds, allowing shooters to fine-tune trigger pull weight for improved control and shot precision. A stored adjustment wrench is conveniently housed in the buttstock compartment.
Additional ergonomic enhancements include an AR-pattern pistol grip and 45° reversible safety selector for intuitive handling and improved control. The platform is compatible with most AR-style grips and selectors for further customization.
A 0 MOA anodized Picatinny scope base provides a stable mounting platform for optics, while an oversized bolt handle ensures smooth, positive bolt manipulation -- mirroring the design of the Ruger Precision® Rifle.
The 15" aluminum free-float handguard features a black hard-coat anodized finish and full-length Magpul® M-LOK® compatibility on all four sides, offering flexible accessory mounting and improved clearance for long-range optics.
The cold hammer-forged barrel, manufactured from 1137 alloy steel, delivers ultra-precise rifling for enhanced accuracy and long-term durability. It is easily replaceable by a qualified gunsmith using AR-style tools and headspace gauges. A 1/2"-28 threaded muzzle includes a factory-installed thread protector to safeguard threads and crown.
This platform is compatible with Ruger® magnum rimfire magazines, including the JMX-1 rotary magazine and BX-15® Magnum magazine, and includes one 9-round JMX-1 magazine for immediate use.
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