We sell and manufacture a AR500 metal shooting gong which reverberates various sounds back to the shooter to tell them if they hit the target, and where, by the sound which the shooter hears upon contact by the bullet. The sounds are different based upon the center of the target which sounds like Ding. The middle ring which sounds like Dang. And the outer ring which sounds like gong. The gong, if painted when hit, will pop the paint off when the bullet hits allowing the shooter to see where they hit depending on the distance from the shooter.