Here's simple mod done to Munitioner so he can have a shoulder cannon: To achieve this, simply drill a hole on the square part on the backback as seen there: I used a 3/16 size drill bit (wich is a wee bit smaller than the peg), then used a 13/64 bit carefully to expend the hole for the guns to fit. You'll have to be carefull with positionning as it fit tightly when the side of the hole touch the car roof walls, wich will leave just enough plastic in the back. The gun that fit best is this one, with the moveable piece removed: But can also fit the regular blaster: The other guns don't have a long enough peg to fit well (or the hole position is too deep). But now you can have a well armed Con! And you can do it to both side even, but I didn't wanted that much firepower PS: I saw after the pics where taken that the backback wasn't pushed against the body, so no need to point it out!