Just as further info. Once you have the TGP on and have pressed the A-G button on the MFD. The top row left button on the MFD says CNTL, press it, and on the right side middle button of the MFD it will say Latch Off, press it once and it will say Latch On. Then press the top left button where it says RTN. What this does is make it so one press of the Insert key will turn the laser on, another press will turn it off. Otherwise, you need to hold down the insert key to keep the laser firing, just remember to turn the laser off after you turn it on or it will overheat.