He's referring to the gun-mafia siphoning off part of the weapons deliveries to the Ukraine and Russian armies and selling them on the black market. The weapons have been turning up in completely different countries.
https://en.wikipedia.org/wiki/List_of_countries_by_firearm-related_homicide_rates
One can tell many things. But in europe, there is not a big problem with gun violence. There still is, and it is great to find ways to counter them.
But no comparison to America.

I just assumed you are american, when you talk about Europe like this. It seems to me you do not know much how save it is here.
And it is quiet obvious you misunderstand something. There is no agressive action from NATO. NATO is a defensive allience. So NATO helps Ukraine to defend their teritory.
Discussion
lol, yeah of course they are helping... cover it up...