the "bolt" the bit that moves forward to push the ball into the barrel to shoot the ball out it moves forward pretty slowly with a little bit of air behind it ( thats why you can put your finger in there and it bounces off and goes back to start postion so to speak) to push the ball to the forward and then when it reaches a certain point it then releases another volume of air to chuck the ball out the barrel at speed if you see what i meanThe difference is MADD but I don't get how it doesn't hurt when u put your finger in it and it still makes the ball fly so quick?