Designed specifically for use in Taurus PT92, PT99, PT100, and PT101 pistols, the LMS-1441 replaces the factory spring guide assembly with a high intensity red laser sighting system for advanced target acquisition. Easily user installed without the need for gunsmithing or special tools.This Guide Rod Laser is for full size pistol only. Pulses for superior visibility and faster identification Internal design does not restrict grip or holster selection Distinct ambidextrous ON/OFF switch reinforces safe firearm handling Proximity to the bore provides maximum POA/POI accuracy Guaranteed alignment ensures center of mass shots