Crimson Trace Corporation Hi-Brite Laser Grip, Fits Ruger LCR, Standard Polymer 01-4330-1 LG-415 Lasergrips(R) 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(TM)" 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.