High Quality Content by WIKIPEDIA articles! The Ruger 77/22 is a bolt-action rimfire rifle chambered for the .22 Long Rifle, .22 WMR, or .22 Hornet. It has a removable rotary magazine which allows the magazine to fit flush with the bottom of the stock. The 77/22 was introduced in 1983 and was based on the centerfire Model 77 Mark II. Each rifle comes with scope rings and a lock.