I have to agree. I looked through all the identification pix for chrome guns on TFland. They didn't show any gun like that one.
I've not seen guns like those for Transformers either. It's either a non-TF part, or something more obscure than what I'm familiar with.
ok pal thanks for checking that's what I though I looked through my resources as well with no luck. just thought someone would have an idea, (even though they are not transformers) what they belong to.