These parts are sets of weapon fixation parts and weapon parts (gun) for TAV Runabout. These parts can be attached to Rodimus, Blackjack other than Runabout. The weapon fixation parts can hold the ax-formed weapon attached to the toy like a wing in a robot. In addition, you can change into a vehicle with putting on weapon fixation parts. Furthermore, weapon parts (gun) are attached. As for these parts, a handle is a 5mm diameter. Runabout can grasp it. The weapon parts can fit a handle in the upper ditch of weapon fixation parts in a vehicle mode. Please refer to a photograph for the details.
http://www.adventoys.com/#!tav-runabout-wing-hold-and-weapon-parts/gyg23