This is the one pictured in American Thunder III.
I paid 10k for it about 20 years ago.
I was fortunate to find about 15 20-rd magazines many years ago from a shop in AZ that was going out of business.
Some were still new in the box. I paid $15/ea for them.
I sold most of them and kept a few for myself.
The UD 42 is very nice to shoot, cycles fairly fast, and is heavy, thus easy to control.
Every once in a while I bring it to the Thompson shoot and fire it. But parts are hard/impossible to find, so I don't shoot it much.
I did find a complete lower at SAR West one year for $300.00. Sorry not for sale.
A long time ago there were several UD42s for sale at Knob Creek, they had Berkley PD police stickers on them.
I forget who had them ??? Werks.