Includes two interchangeable standard length of pull stock modules that provide comb height options for scope or iron sight use; Includes the detachable, flush-mounted JMX-1, 9-round rotary magazine and accept the BX-15 Magnum magazine; Ergonomic, lightweight black synthetic stock (designed for quick, easy handling) blends a classic look with modern forend contouring and grip serrations; Easy-to-use, extended magazine release provides smooth, no-fuss removal of the flush-mounted magazine; Ruger Marksman Adjustable trigger offers a crisp release with a pull weight that is user adjustable between three and five pounds, allowing shooters to make that perfect shot; Features a visible, accessible and easy-to-actuate tang safety that provides instant security; Threaded barrel with factory-installed thread protector is cold hammer-forged, resulting in ultra-precise rifling that provides exceptional accuracy and longevity; A 3/8" rimfire scope base is machined into the receiver, which is also drilled and tapped for Weaver #12 bases; A 60 degrees bolt provides ample scope clearance and the easy-to-use, receiver-mounted bolt release allows the bolt to be readily removed without requiring a pull of the trigger, a unique safety feature among rimfire, bolt-action rifles; Compatible with the Silent-SR sound suppressor