A clip for Swindle's (Warbotron Sly Strike) canon to mount on his shoulder, can be used on either side. The Rectangular clip goes around the bars where the front of the humvee is attached too. The round clip is to store this piece in vehicle mode on the bars on the back of the humvee. The octogonal peg is so his canon can fit in it with the longer handle. In this case the canon has a larger range of movement than with the 5mm peg hole.
This one is improved with a tab so no friction tabs, just a hinge and a tab.
Tested in White strong and flexible!
Updated with bigger tab! And the other piece of the same type is tested so this should be good as well.