Factorio Artillery Cannon

The Factorio artillery cannon to no biter nest is safe.

I used various M3 bolts/nuts to fasion everything together.
I had to use epoxy to put a bolt on the flat part of barrel to screw down the top of the turret i'll probably redesign it to just use a knurled nut

I uses super stretchy hair bands as the resistance with a glued in bolt on one side to snag and trapping them on the hammer with a washer and nut

simply super glued the bottom U part to the center post.

parts list:
M3 scr