So, I've wondered for long time if taking a part and making a copy of it, but mirrored is possible. As far as I know, there isn't a way. Now that I have a case in which I would need to do just that, it's time for me to ask about it.

I have a figure that I got with the intention of practicing customizing, without knowing yet what to make of it. I have now decided on a character. In official art, that character always holds his weapon in his right hand, and generally has the left hand in a closed fist. The figure I got has the right hand closed in a fist and the left hand in a "gun holding" position. It would be great to have one hand in the pose of the other.
Is that possible at all? Thank you.