I wish I would have thought of it. Looks good, Have you tested it yet? I take it the spring is so the hostage taker takes the round and "springs" back up?
Rich, that is awesome! Well done, sir. Are you planing on running tactical clinics of some sort for this?
is that an MGM? How much?
The next logical step would be to figure out how to put the assailant head on a threaded pipe and motorize it so that the head moves in and out from behind the hostage head.