People use guns to commit suicide because they are sure they want to die. Why do you believe half these people wont use a bus or a bridge instead?
You miss the point. If you plan to use a gun to commit suicide, you are committed to the idea of dying. Thus, there is no sound argument that -any- of them could be saved.
Yes... For every gun used to commit suicide, >16,000 are not. Conclusion: We need more gun control!!!