LG-415 Lasergrips® are designed to fit Ruger LCR and LCRx revolvers by simply replacing the factory grips. This laser sight features Crimson Trace's famed Instinctive Activation™" which activates the laser when the firearm is held in a natural firing grip. Laser activation button is located in the front" and the unit includes a Master On/Off Switch for completely powering down the unit. With battery life of over four hours and fully adjustable for windage and elevation" the LG-415 is quickly user-installed in moments with zero alterations to the firearm.