It's the liberals who have been working overtime trying to make sure that illegal aliens, violent looneys, and felons don't show up on a NICS check. They want to control guns, not prohibited persons from acquiring them.
The Virginia Tech and Phoenix Arizona mass murderers should both have been prevented from buying firearms at a retail sales location, but liberals don't want lunatics stigmatized with mental disorders inside a government database.
... So, liberals would rather ban firearms magazines that can contain bullets over an amount that the liberals pulled out of their butts as an unacceptable number of bullets to have at the ready while they let lunatics run free from the booby hatch getting guns without restriction.
That's just idiotic.
Can you guarantee that NICS will never be used to deliberately abridge the RKBA of free people who are not even alleged--much less proven--to have committed any crime?