Jelze Bunnycat wrote:Correct on the Lego part, it's a "1/2 Bush" found in many Technic sets. Its grey color is quite common and only worth up to 5 cents used. Black ones on the other hand go for a whopping $6 used.
That Optimus Prime part should belong to the DotM Ultimate figure, it's part of the pinned(!) shoulder armor assembly:
Transformers Dark of the Moon Ultimate Optimus Prime Gallery
I think you can see why that part breaks off a lot.
:EDIT: That double-barreled gun should belong to Prime Weaponizer Bumblebee.
That's weird about the Ultimate Optimus shoulder pieces. The pieces I have are not broken. I wonder if there was a running change on that mold where they got rid of the pin. Seems odd that there wouldn't be a pin still there with a broken piece of the clear plastic on the various pieces I have here in my store.
Thanks for the tip about the double-barreled gun.