What's in the Box Mark IV 22/45 Lite 22LR Rimfire Pistol with Black Anodized Slide Finish (2) 10 Round Magazines Cable Lock Owner's Manual Firearm Features Simple, one-button takedown for quick and easy field-stripping and proper chamber-to-muzzle cleaning. Pressing a button in the back of the frame allows the barrel-receiver assembly to tilt up and off the grip frame without the use of tools. Comfortable, precision-molded polymer grip frame with a serrated frontstrap and checkered backstrap. Features a lightweight, ventilated, aerospace-grade aluminum receiver and a tensioned stainless steel barrel. 1/2"-28 threaded barrel with thread protector allows for the attachment of popular muzzle accessories. Cold hammer-forged barrel results in ultra-precise rifling that provides exceptional accuracy and longevity. Ergonomic bolt stop. Checkered, 1911-style grip panels for a great appearance and comfortable, non-slip hold. Internal cylindrical bolt construction ensures permanent sight-to-barrel alignment and higher accuracy potential than conventional moving-slide designs. Contoured ejection port and easy-to-grasp bolt ears allow for durable and reliable operation round after round. Accurate sighting system features an adjustable rear sight and a factory-installed Picatinny rail for easy mounting of optics. Ambidextrous manual safety can be converted to left-side only with included washer. Features a conveniently located push-button magazine release on the left side of the frame. Magazine drops free on release for convenient reloading. Magazine disconnect prevents discharge when the magazine has been removed. Firearm Specifications Manufacturer: Ruger Model: Mark IV 22/45 Lite Caliber: 22LR Barrel Length: 4.40" Twist Rate: 1:16 Finish: Black Anodized Magazine Capacity: 10+1