Quoting Darcy Guerin Hanlon
so when you pull the bolt the barrel will move with it or when you pull the trigger?
looks great so far!
Under ideal circumstances: Pulling the trigger causes the bolt to move back, which also pulls the barrel back. Since I have no way of making the trigger move the bolt such a long distance, I will do the next best thing which is to make the barrel move back when the bolt is pulled.