Maybe reconsider throwing around words like “naiive” when your source is a Europol briefing document covering various threats at a high level with no stats or numbers.

Especially since if you actually dig into it, you’d find that Europe’s illegal gun trade comes partially from old military and police weapons from the Balkans / collapse of the Soviet Union, partially from theft of legal firearms, partially from weapons that are imported (legally and illegally) from the US and Turkey, and minorly from weapons smuggled in from other war zones / 3d printed guns.

The fact is that gun control works. Dislike that all you want but it doesn’t change the stats or reality you the world.