Do any of you know where I can get one of these? I searched around and couldn't find much. I have seen some vids online. I just want something that produces a satisfying noise and can be shot over and over. Assuming such a thing is safe. Also if possible something that I can shoot with my AK, AR, and handguns. Can anyone point me in the right direction? Here is an example, although I can't see what he's shooting at lol. http://www.youtube.com/watch?v=HRk8DNMizw4 Thanks in advance.