PISTOL: RUGER MODEL MARK IV, SERIAL NUMBER 500234531, SEMI - AUTOMATIC, 22 LONG RIFLE (22LR), BLUE, YES - INCLUDES ORIGINAL BOX, 5.5" Notes: Ruger Mark IV 22/45 .22 LR Pistol - 5.5" Barrel, Blued, 10+1 Rounds Comes with hard case and two extra 10 Round Magazines The Ruger Mark IV 22/45 is a .22 LR semi-automatic pistol combining the classic styling of the Ruger Mark-series platform with a polymer 22/45-style grip frame. It features a fixed-barrel design, ergonomic grip configuration, and straightforward controls. The Mark IV platform is designed for convenient field maintenance, making the Ruger Mark IV 22/45 a distinctive rimfire pistol suited to recreational shooting and target practice.