The SIPRI, Stockholm International Peace Research Institute, has just published an interesting article of study on the arms market.
The results of the study of the SIPRI show that the arms market is still much, too, widespread and that buying illegal weapons is not as difficult as it seems.
To reflect I leave the link: https://www.sipri.org/news/press-release/2018/asia-and-middle-east-lead-rising-trend-arms-imports-us-exports-grow-significantly-says-sipri
I look for your numerous considerations in the comments.