Sig Sauer P320, a popular handgun with police, is firing on its own

Just like not wearing seatbelts is safer, since you get thrown clear of the wreck?

Officers get in waaaay more physical altercations than quick-draw duels at the OK Corral. Lack of safety switches is only more advantageous to the subjects they inevitably end up grappling with, who have one less step to deal with in removing the officer's service weapon and using it against them.

gosh, there’s always some argument about the defn of “safety” when discussing Glock. A Glock trigger has a little spring-loaded tab which is depressed when you hold your finger on the trigger. When it is visible the Glock can not fire. This they call a “safety”, seems a little sketch but ok, I get the point. There’s some other internal features backing it up, but the trigger is most obvious.

The P320 had an internal lock-out widget that would disengage when you pull the trigger a wee bit and a spring loaded sear (? do they call it that for strikers?) one trivial whack away from releasing even if the trigger was not pulled to the break (the expected release point). I would call that absurdly wrong. The upgrade fixed this similarly to the P365.

The P365 has a similar lock-out widget to the P320 (they call it an internal safety in the manual), but it doesn’t disengage until the trigger is pulled into the break. The “striker” has a tab on it which is blocked to that point by the widget. You can disassemble it all and measure the distances the parts move to release, but I actually looked at a SolidWorks 3d model someone in the aftermarket industry shared with me and verified my pistol had the same dimensions at a critical point. I think if the striker tab or the widget broke it could fail silently. I check it about weekly or less.