Each Ruger American Rimfire rifle includes two interchangeable stock modules that provide comb height options for scope or iron sight use. The lightweight black composite stock has sling swivel studs and is designed for quick and easy handling with a 12.5" length of pull. The Marksman adjustable trigger offers a user adjustable pull weight, between 3 and 5 pounds. The hammer-forged barrel is threaded and has a target crown. The thread pattern is 1/2"-28. It has a 10/22 style extended magazine release for smooth magazine removal. This rifle also features a fiber optic front sight and adjustable V slot, folding leaf rear sight. A 3/8" rimfire scope base is machined into the receiver, which is also drilled and tapped for Weaver #12 bases.