The Ruger 10/22 is a series of semi-automatic rifles produced by American firearm manufacturer Sturm, Ruger & Co., chambered for the .22 Long Rifle rimfire cartridge. It uses a patented 10-round rotary magazine, though higher capacity box magazines are also available. The standard Carbine version of the Ruger 10/22 has been in production continuously since 1964, making it one of the most successful rimfire rifle designs in history, with numerous third party manufacturers making parts and accessories for upgrading and customization. In fact, the 10/22's aftermarket is so prolific, that a 10/22 can be built with completely non-Ruger made components.
A magnum version of the 10/22, chambered for the .22 WMR cartridge, was made from 1998 to 2006. A .17 HMR version, the 10/17, was announced in 2004, but was only listed in the catalog for two years.