RUGER MARK IV 22/45 LITE .22 LR, 4.4'' Barrel, Riton Red Dot, Purple, 10 Round 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. Threaded barrel models feature a 1/2"-28 thread pattern for popular muzzle accessories.