I am not at all sure that our civilized society keeps someone who knows the ropes from acquiring MG's, RPG's, and grenades. Just look at how gang bangers keep getting armed, or Mexican drug cartels getting anthing they want despite the strong laws there. On the other hand we more normal people don't know where to go for illicit things, being it guns drugs, or sex.
I am sure any of our "enemies" could ship anything they want into the country the same as it is into Mexico and other places.
