ATI Cat OS Laser Pistol Sight for Glock Pistols with Back Up Iron Sights CAT patented semi-permanent duty grade polymer mounting system is functionally and esthetically designed to perform and look as part of your Glock pistol Our proven superb laser housing and mounting systems are covered by CAT's exclusive lifetime warranty. In addition to this we offer a one year warranty on modules and electrical components. New state of the art micro laser module capable of emitting light up to 800 yards in optimal conditions. All the required installation tools are supplied with our laser devices. Low profile integral quick access ambidextrous on-off switching.