Third-generation Ruger rimfire pistol. Replaced the Mark II in 2004 with magazine disconnect, loaded chamber indicator, and internal lock. Discontinued when Mark IV launched. Type: Pistol Action: Semi-Automatic Caliber: 22 LR Capacity: 10 Year introduced: 2004, USA Weight: 35 oz Overall length: 8.75" Status: Discontinued Intended use: Plinking, Training, Target Shooting