The Ruger Mark IV Tactical is a semi-automatic .22 LR pistol with a 4.4-inch threaded stainless barrel optimized for suppressor use. The Mark IV generation introduced a single-button takedown system that vastly simplified field-stripping compared to the notoriously difficult Mark I through III designs. Optics rail included. Type: Pistol Action: Semi-Automatic Caliber: .22 LR Capacity: 10 Year introduced: 2016, USA Weight: 34 oz Overall length: 8.8" Status: Active Intended use: target shooting, suppressed shooting, training