Hi, <br>I am planing on building a Slingshot Bow where a sledge in a tube is used to accelerate a 12mm steel ball. What is the best way to stop the sledge at the end of the shooting phase? I just want the ball to fly not the sledge too. I think otherwise the sledge will just destroy the front of the crossbow. <br><br>My plan so far is to have a magazine on top, so a pump gun action will reload a steel ball and cock the crossbow at the same time.