The Ruger 43956 Mark IV 22/45 Lite brings the reliable Mark IV platform to shooters who want a lightweight, accurate .22 LR pistol for range training, plinking, small-game hunting, and suppressor-ready applications; its one-button takedown simplifies field-stripping and cleaning by allowing the barrel-receiver assembly to tilt up and off the polymer frame without tools, while the ventilated aerospace-grade aluminum receiver and tensioned stainless steel, cold hammer-forged 4.40" barrel with 1/2"-28 threading and thread protector deliver durable, precise rifling and the ability to attach muzzle devices or a suppressor. The internal cylindrical bolt maintains permanent sight-to-barrel alignment for consistent accuracy, the serrated slide with contoured ejection port and easy-grasp bolt ears ensures reliable cycling, and the adjustable rear sight plus factory Picatinny rail make optic mounting straightforward. Ergonomic features include a serrated frontstrap, checkered 1911-style grips, ambidextrous safety convertible to left-side only, push-button magazine release with free-drop magazines, and a magazine disconnect for added control; overall length 8.40", weight 25 oz., 10+1 capacity.