The Ruger MKIV 22/45 Lite is a lightweight .22 LR semi-auto pistol built for range time, training, and small-game work, and it requires FFL transfer; this MKIV series takes the classic 22/45 platform and pares it down with a ventilated aerospace-grade aluminum receiver and oversized G10 grips to deliver a slim, controllable 25.9 oz package that balances recoil and handling. The 4.40" cold hammer-forged, tensioned stainless steel barrel with a 1:16" twist and six grooves provides long-lasting, consistent accuracy while the internal cylindrical bolt maintains permanent sight-to-barrel alignment for repeatable performance. You get a simple one-button takedown that lets the barrel-receiver assembly tilt up and off the grip frame for tool-free field-stripping and thorough chamber-to-muzzle cleaning, plus contoured ejection port and easy-to-grasp bolt ears for reliable cycling. The sighting system includes a fixed front and adjustable rear sight and a factory Picatinny rail for optics, the ambidextrous manual safety can be converted to left-side only with the included washer, and a left-side push-button magazine release with drop-free magazines and a magazine disconnect add user-friendly reload and safety features. Finished in black anodized aluminum with a polymer grip frame and non-threaded barrel, the MKIV 22/45 Lite is a durable, accurate .22 LR handgun ideal for shooters who want a light, accurate semi-auto for teaching, practice, or fun at the range.