This is the most innovative, versatile and best selling handgun mounting system in the history of laser sights. Its integral design fits nearly every semi-automatic or revolver. This popular laser is available in both wireless and pressure activated designs. The wireless version features "constant on or off" modes whereas the pressure activated version utilizes a remote switch allowing momentary "on/off" activation. Both have a night range of 500 yards and include adjustments for windage and elevation.