Step 3: The barrel

Picture of The barrel
Picture 282.jpg
build the barrel it fires best with the blue rods.
if that is the trigger, add an elastic band, and a yellow connetor with white rods coming from it from one end, and the diagnoal slot, like \ /, then connect it to one of the black pieces, and attach the elastic band from the horizontal white rod, to the trigger
its not a trigger
oh, then what exactly is it?
a block trigger
ok well i was half right