The Ruger American Rimfire Standard 22LR with an interchangeable standard length of pull, high comb stock module ideal for use with optics. By simply removing the rear sling swivel stud, stock module can be changed in seconds. The ergonomic, lightweight synthetic stock blends a classic look with modern forend contouring and grip serrations; the 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. Featuring a visible, accessible and easy-to-actuate tang safety; threaded barrel with factory-installed muzzle brake; factory installed one-piece aluminum scope rail; 60 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. The rifle includes the patented, detachable, flush-mounted BX-1 10 rd rotary magazine and accepts all 10/22 magazines, including the BX-25, BX-25x2 and BX-15. Also includes sling swivel studs. Compatible with the Silent-SR sound suppressor.