I'd argue that there isn't a good argument against gun control. The 2nd amendment gives US citizens the right to bear arms but pretty much any sane person will agree that there should be control over some arms. You aren't allowed to build a nuke or make sarin gas in your back yard. If everyone agrees that control over some weapons is a good idea then why would guns specifically be exempt from regulation?
Here are a few questions I'd like to see answered by someone who is against gun control: Should we allow the sale of devices that modify guns to fire at a rate of 100s of rounds a minute? Should we allow the sale of guns to people with a history of violent crime? Are there mental illnesses that should prevent someone from owning a gun? Should we require a cooling down period between when a person decides to buy a gun and when the actual purchase goes through? Are there any places we should not allow people to go while armed with a gun?