Dave -
Yes.. because people cannot easily do it by stepping in front of a train, taking an overdose of easily obtained illegal drugs, jumping off a 10 story building, etc
Statistically - they don't. Probably because not everyone has a train at hand when they feel suicidal.
What we know as a plain, simple, proven fact is that more successful suicides involve guns than most other methods, and that guns feature more in US suicides than in most other countries, because the guns are so easily available.
Reduce guns - reduce sucide. Australia has actually proven this as a statistical fact.
Reduce guns, increase crime. Chicago has actually proven this fact.
With over 200M guns in circulation you are not reducing guns in any meaningful way without infringing on Americans' rights. If someone wants to attempt suicide, that is a public health and mental health problem. Treat that problem, not the tool.