Ruger's Mark IV Rimfire Pistols feature a one-piece CNC-machined grip frame for exceptional precision and a simple one-button takedown that makes chamber-to-muzzle cleaning a breeze. Internal cylindrical bolt construction ensures the sights are in perfect alignment with the barrel at all times, delivering the potential for incredible accuracy. Contoured ejection port and easy-to-grip bolt ears. Ambidextrous manual safety. Left-hand magazine release ejects the magazine with authority for speedy reloads, and a magazine disconnect prevents the gun from firing when the magazine has been removed. Ergonomic bolt stops. Adjustable rear sights. Receiver is drilled and tapped for Weaver- and Picatinny-style scope-base adapters. Includes two 10-round magazines. Grip frames are CNC-machined from one piece of metal One-button takedown makes field stripping a breeze Cylindrical bolt construction aligns the sights with the barrel Ambidextrous manual safety and magazine disconnect Drilled, tapped for Weaver- and Picatinny-style scope-base adapters