"Universal background checks, with database" is a euphemism for "national gun registry" which is the precursor to "selective seizures" which is then followed by "national disarmament."
Seriously, guys, it is more important to spike this "universal background check" thing than to prevent arbitrary banning of selected arms.
They'll throw up a big "ban everything" bill, and then "reluctantly" offer a "compromise" of national gun registration under the rubric of "background checks."
This needs to be killed with fire.