Most of the guns that the Cartel gets are from South America since they are sold for much cheaper and much easily. Plus a significant number of weapons are stolen from the Mexican military every year. The AK variants for example do come from South America which is a far more popular weapon among the cartel. Over 90% of weapons confiscated were not traced back to the United States. The 10% of weapons however had about 80-90% traced back to the United States.Zarathustra[H];1041683296 said:You do realize that illegal guns flow FROM the U.S. to Mexico, because they are so much more readily available here than they are in Mexico, right?
https://www.stratfor.com/weekly/20110209-mexicos-gun-supply-and-90-percent-myth
Basically if the Mexican Military suspected the weapon came from the United States, they are more likely to get a hit. If they don't suspect it came from the United States because it's an AK variant or something else, they don't bother. Hence it's why it's assumed that most weapons come from the United States.