I think that the NRA's and Gun Owners of America's paranoid opposition to reasonable gun control is going to backfire. Consider the case of marriage equality. If the homophobes had been willing to grant all couples civil unions, with identical rights and responsibilities to marriage, the issue could have been settled without recourse to Constitutional rights lawsuits. But homophobes bought into the slippery slope fallacy, that civil unions were just a stepping stone to forcing christian churches to perform same-sex marriages at gunpoint, the collapse of western civilization, yadda yadda. They fought just as hard against same-sex civil unions as same-sex marriages. But equality advocates rightly concluded that if there was no compromise to be gained, there was no point in attempting compromise. They gave up on civil unions, fought for (and got) full marriage equality.
Now look at gun control in the same light. Gun nuts have bought into the slippery slope fallacy in exactly the same way, claiming that simple, sensible measures like universal background checks, treating guns like cars and requiring licensing, registration, and insurance, limits on magazine size, etc. will inevitably lead to government death squads roaming the streets in armored vehicles, yadda yadda. I believe that their refusal to budge on even the most reasonable efforts to prevent mass shootings will lead to a similar conclusion among gun control advocates: if there can be no compromise, then why bother to try to achieve a moderate solution? If small steps are just as unacceptable as large steps, why not go for the large steps?
Gun ownership advocates have a choice. They can do nothing but obstruct, and see more draconian gun control laws come when the dam finally does break, or compromise now, and try to find a middle path, together.
P.S. Personally, I favor repealing the Second Amendment, but that's not likely any time soon.