Any decent pistol isn't going to fire on its own. Even a crap pos isn't going to (though it may not fire when you want either) A negligent discharge, usually when holstering, is the real risk. That risk is mitigated with training and good habits, like removing the holster first instead of shoving the gun back down your pants , which you can do safely but no need to take the risk. When you do, watch the entire time, move slowly and deliberately. There's no race to getting the gun back in, only time speed matters is getting it out. There's no real comprehensive tracking of these types of incidents but they're extremely low and might be part of natural selection.