It's going to be a critical issue come 2020. If Hillary wins this year, I hope she is unable to appoint ultra liberal SC justices with a "living document" interpretation re: the 2nd amendment. Any one else and I'm confident we'll be able to last the full first term without any further judicial reinterpretation.
That being said...
Lots of people are in favor of gun control. Lots of people are in favor of restricting guns under certain circumstances. Not many people are discussing that the 2nd amendment says ARMS (not limited to guns,) and SHALL NOT BE INFRINGED; meaning any and all laws restricting or banning anything that can be considered a weapon is Unconstitutional.
Obviously, it hasn't been interpreted by the courts this way. I have a fair amount of Constitutional knowledge and I'm mostly in your corner, but I much prefer arguing for the merits of gun ownership on the basis of a right to self-defense. It aligns perfectly with the NAP and there's plenty of good data to support it as a matter of pragmatism.
Devil's advocate, because if you are going to argue that the Constitution grants the right of the people to possess ANYTHING that could be classified as a weapon, and that is not to be infringed by the State in any way, this is what you will hear from anti-gun statists...
You cool with individual citizens having access to WMD?