No im not

Its some kind of hack

Ok fine ill try draw it

G= guy |= wall

If there was two people say in blazing bandits if the where positioned like this
G|G they would be able to hurt each other because as you said the barrel goes over the wall
But im talking about G | G Where the shoots it goes through the wall and hurts the guy without going near the wall to put the gum over. Now if you have an imagination youll understand if not ten dont worry about this, id delete it if i knew how