This is what happens when you make private gun ownership nearly impossible for law abiding citizens and when there's a lack of policing. https://www.mirror.co.uk/news/world-news/breaking-mexico-city-shooting-11-27047439
What amazes me is that guns are so prolific in Mexico because there is only 1 approved gun business in the whole country. It's almost like criminals know how to get guns regardless of laws.