The "normal" suicides trough a firearm probably have a higher rate of military firearms because people probably choose the firearm with the higher success rate. Also because suicide is more likely to be committed by younger persons and younger male persons usually do own a military rifle. If one completely finished military service and you want to keep your rifle you can do that. It will be converted to a semi-automatic rifle. This then would not count as suicide my military firearm anymore. Depending on military function this can be anywhere between the age of 30 up to the age of 40.
> In 83.1% (n = 1112) of the 1338 suicides by firearm between 2000 and 2010 in Switzerland, the firearm could be categorised as an army weapon or a non-army weapon. The army weapon was used in 39.1% of these suicides.
https://smw.ch/article/doi/smw.2018.14646
But that is not surprising. Suicides often happen out of an impulse and then people use the best available and easiest accessible means to kill themselves. And an army weapon fulfills those conditions much better than anything else people have at home.
I don't know if there are already newer studies that take into account that the ammunition isn't storaged at home anymore.
I also couldn't find any numbers on "family tragedies".
That means if you don't have an effective way of ending your life at hand, it's likely that you will not try again successfully.
If you need ammunition, you are not likely to go out and get it. That's inconvenient and even if you go out and want to get it, that takes time in which you might reconsider.
E.g. my uncle specifically bought rope and carabiners prior to his suicide, and, apparently, had googled instructions on how to tie a noose several days ahead of the actual thing.
Though I have no data about this.
I mean, it's not exactly as if the Swiss militia let them operate an independent foreign policy last time they felt threatened with invasion.
The simple truth is that an accessible gun has a higher chance of being abused or involved in an accident than one that is locked in an arsenal or doesn't exist in the first place.
Even in law enforcement, even though they often need guns, no matter what country, guns are abused regularly.
Which reminds me of the video of an FBI officer that accidentally discharged his weapon while break dancing.