The 2nd Amendment
It's about more than just guns...
If the government disarms the public through unconstitutional regulations, it does more than just leave innocent, law-abiding citizens exposed to criminals--it takes the first dangerous step towards justifying infringement upon any number of our other rights. The slippery slope between the first gun confiscation and exploitation by a government that oversteps it's legal limitations is short and can be traversed rapidly. The only way to ensure this absolutely cannot happen is to guard the citizenry against the threat in the first place.
I fully support the right of all law abiding Americans to own guns and to carry a concealed firearm.