I'm against the universal background check because it is unenforcable without first having universal gun regisration.
It will quickly be pointed out that that is the big failing of the law and the "fix" would be regisration. As we all know, regisration is the first step to confiscation. I'm not one who believes that our current government is evil or that any current leaders are trying to enslave the population. What I do know is that if such people come to power in the future, we will have no defense without arms and even only a little defense with them.
You don't need to look any farther than Siria to see what a struggle it is to overthrow an evil government.
Small arms ain't much but it's better than nothing.