Mexico has Armed Forces too. I’m sure their armories have these types of weapons too. that thing could have come from their stocks.
Hey, I’ve personally seen RPG’s, Grenades, Light Antitank Weapons and Flamethrowers on sale at WalMart.
But I don’t think the average citizens should be able buy these things there, even WITH a background check.
I do believe in the Second Amendment because duck hunting is pretty good outdoor sport, and the Second Amendment allows that.