Topped with sights for quick target acquisition, the North American Arms Magnum Mini Master .22 WMR Revolver boasts a compact, stainless-steel frame with a 4-inch heavy-vent barrel and a bull cylinder. This single-action revolver is designed with rubber grips and an exposed hammer. North American Arms Magnum Mini Master .22 WMR Revolver - Handgun Revolvr Rimfire at Academy Sports