The Mark IV solved the long-standing disassembly challenge of all previous Mark series pistols with a single button takedown. Push the button, the receiver separates — a redesign that took 67 years but was immediately celebrated by Mark series owners. Type: Pistol Action: Semi-Automatic Caliber: .22 LR Capacity: 10 Year introduced: 2016, USA Weight: 33 oz Overall length: 8.75" Status: Active Intended use: Target, Plinking, Training