This shooting target are used for shooting practice with laser pistol. The laser gun is made of a modified laser pointer with a pistol handle and a pulse-shaped laser beam that resembles a bullet passing through.
This shooting target is made of a stainless steel cup. There is a hole in the center of the target paper, if the laser beam hits the center (bulls eye), then the laser beam enters the cup, and will be reflected. Since the target paper is smaller than the cup's mouth, the reflected laser beam can be seen as a luminous outer ring.
See the following video:
An electronic circuit can be applied to this shooting target to create chime sound like bell or like steel hit by a bullet when bullseye. See the following video: