Hex bolt zip gun - GIF

[mr mikey]

I have seen a lot of zip guns over the years. What I see with this one is if its dropped on that pull ring the round will fire (totally unsafe). Someone is going to be hurt or dead. The pre 80 series 1911 had a problem like that when dropped with the barrel straight down the firing pin will move forward and fire the round. 80 series incorporated a firing pin block. My thoughts.