My point above was that it is not that difficult to find other options.
I don't have time to pull up and link the sources for this and I probably shouldn't mention it, but... In the US, the majority of shooting deaths are suicides. One sad thing that the US and the UK share is that we have very similar suicide rates. In the UK, perhaps because guns are less available, hanging is the preferred means.
Again, I am not a gun rights person, I am just saying that the simple solutions are not going to solve the problem.