GripSense represents the newest generation of laser activation technology by simplifying the activation process. The user simply grips the firearm, setting off a motion sensor once in the detection zone, which then activates the laser immediately and does not require the user to change their firing grip. Additionally, the Lightning with GripSense Activation Technology includes some significant innovations including a fully programmable operating mode, and up to twenty hours of continuous battery life- safeguarded from inadvertent drain by a ten-minute time out feature. The Lightning will come in Vivid Red or Daytime Green, green being the most visible color to the human eye. For pistols with at least 1 Inch of rail space.