The premium prices Mexican cartels are paying for guns mean that even if the U.S.-Mexican border could somehow magically be sealed tomorrow, arms merchants from elsewhere would be able to fill the void. Indeed, there are some weapons that the cartels simply cannot buy from the United States due to a lack of availability. Such weapons include hand grenades, 40 mm grenades, M60 machine guns, rocket-propelled grenades and M-72 anti-tank rockets. Instead, the cartels buy such items from members of the Mexican military, militaries in countries such as Guatemala and El Salvador, or international arms dealers.
Interesting note in the article that cartels are apparently using 80 lower receivers. How far do you go before you’re legally regulating blocks of aluminum? As we have demonstrated, it’s not hard to make a gun, so it’s not surprising the cartels are machining their own from 80 stock.