It might be a shop that sells classic guns which are not in working condition.
The current legislation in EU permit to buy such items from various countries and easily make a working
Kalashnikov.
Check Slovakian and German AK.
This item is legal in EU and banned in USA:
Please prove your points. I'm pretty sure that it's absolutely not allowed in France for example. And in fact I don't see in which EU country it could be allowed...