You need a disposable camera flash to project the memory eraser with enough distance to work safely, and you need the circuit in the camera to run it. The main issue is that just putting the camera on the gun and using it like that will make fellow agents and enemy aliens laugh at you. taking apart the camera is easy, just pull it apart by popping the two tabs on the side. Then pull out the inner plastic case after that. This will expose the circuit board. my circuit board popped right out without screws after that but cameras may vary. So now you have the board with the flash bulb on it. This is all you need, the rest can be thrown away.