MARK IV 22/45 LITE FEATURES: Accurate sighting system features an adjustable rear sight, 6ber optic front sight on a ventilated rib and mounting position for Shield RMS pattern optics to co-witness with the iron sights (optic not included). Simple, one-button takedown for quick and easy 6eld-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 front strap and checkered backstrap. Features a lightweight, ventilated, aerospace-grade aluminum r Mfg: Ruger