The Ruger Mark IV 22/45 Lite in .22 LR with 4.4-inch threaded barrel. A lightweight, anodized aluminum-framed Mark IV variant with a .45 ACP-style grip angle. Threaded barrel accommodates suppressors. The 22/45 designation indicates the Colt 1911-compatible grip angle. Type: Semi-Auto Pistol Action: SA Only Caliber: .22 LR Capacity: 10 Year introduced: 2016, USA Weight: 23 oz Overall length: 8.65" Status: Active Intended use: Target, Training, Suppressor Use