15$ - red paint
It is the excellent idea. I wanted to make something similar.
But the drone very badly works at a frost. For this reason of shooting have dragged on for 1.5 month. Once the drone was broken against a wall.
Therefore we have decided not to do difficult tricks with the drone.
GoPro3
gun flash is small)
My friend from police has told what without the reflected flashes looks isn't realistic.
Perhaps a little overdone