Take the grip off unplug solenoid from board and unplug eyes then under the body there are two pieces of square aluminium which are screwed into the body holding the wires for the eyes in place, take them off then there's a small hole where the eyes go through into the chamber, stick the Allan key up the hole then pop out the little rubber thing that holds the eyes in place then you can pull the eyes from the bottom of the body and bobs your uncle lol ! To put it bluntly if your eyes fail during a match it's probably gonna be the case that your gun gets thrown in temper or buy a spare to prevent this lol