ad esempio sul Dark web, ovviamente!
Però poi sono arrestati tutti!
Dal sito di Europol:
International strike against vendor and buyers of firearms via the Darknet
The operation started after Spanish law enforcement was able to trace postal packages containing firearms and ammunition to a 24-year-old resident of Pamplona. He sold his goods mainly through AlphaBay, at that time the biggest Darknet marketplace, which has since been taken down by US authorities. He was one of the largest and best known firearms vendors on the Darknet and took strict measures to avoid being identified by law enforcement.
Seven arrests took place in total. Besides the main suspect, one buyer was also arrested in Spain, three buyers in Germany, one in Cyprus and one in Sweden. More than 30 firearms were seized, together with a large amount of ammunition, spare parts, gun powder, metallic cartridges, etc. The Darknet vendor also acquired gas/alarm pistols from the open web, and converted them in a professional workshop in his garage by inserting new barrels, erasing the original serial numbers and preparing the shipping packages in which he concealed the weapons to pass through security checks unnoticed.