This is horrific, and it's a shame that I wanted to write "as usual" after that.
On the issue of gun control, I think there's plenty of room for reforming and increasing the control of firearms. I think there's very little chance of banning firearms -- such little chance that I don't think it's particularly worth discussing unless you can show some evidence of a groundswell of support that would lead to an amendment.
That said, gun control is entirely on the table. Most responsible gun owners already support stronger control measures, even though they are rejected and lobbied against by the NRA. The first step is to call on responsible gun owners to take their voice back from the NRA and to repudiate their extremist views on firearm ownership.
Beyond that, the focus should start with funding and rolling out an easy to use, national, required background check network. Close the loopholes that allow non-reporting. Levy serious fines for entities that don't fulfill their obligations to report, including mental health facilities, hospitals, gun stores, police departments, etc.
And if you're serious about doing something, let me direct you to a number of sites who would be happy to have your work and your money, to lobby on your behalf:
http://americansforresponsiblesolutions.org/
http://csgv.org/
http://everytown.org/
http://faithsagainstgunviolence.org/
http://smartgunlaws.org/
http://momsdemandaction.org/
http://www.vpc.org/
http://www.bradycampaign.org/
You should be able to find a group that fits you, unless you just don't support any sort of gun control at all. Funding and working for these groups may seem like beating your head against a wall, but it's more effective than continually having the same argument about banning guns, ad nauseam.