The Ruger MK IV Standard is the base model of the MK IV series, featuring a 4.75-inch tapered barrel and fixed sights. It most closely resembles the original Ruger Standard pistol Bill Ruger introduced in 1949. The MK IV generation adds the one-button takedown to this classic configuration. Ideal as a first .22 pistol or plinker. Type: Semi-Auto Pistol Action: Semi-Automatic Caliber: .22 LR Capacity: 10 Year introduced: 2017, USA Weight: 35 oz Overall length: 8.5" Status: Active Intended use: Target Shooting, Plinking, Training