registering gun buyers in border towns costs a lot less money than building a wall
especially if your aim is to hinder people who might be inclined to conduct their own personal black market arms biz from having anonymous access to product
I don't see the problem
law abiding citizens like you and me can still travel to the border of mexico and texas and buy a gun
AGAIN they can easily side step this law...if youre going to conduct your own black market dont you think you would just take the EASY steps to avoid this bs law?

of course you dont, but then again you have no idea about the history of gun registration

again a law that will have absolutely no effect or a wall that will have a great effect...
are you for or against a wall? independent of this law....