With a range of up to 30 feet in daylight, the Crimson Trace Semi-Automatic Lasergrip - Glock 3rd Generation Full Size .17/.22/.31/.35 is made exclusively for the high-performance line of Glock pistols. It adds a level of comfort and helps to reduce recoil. The laser beam is ensured to have an output that is continual thanks to the Enhanced Visibility Optics of this unit. You can shoot instinctively, as there are no additional steps needed to activate the laser sighting. Very precise elevation and windage calibration ensure each shot is on target.