Great thread, y'all, really
This is probably the most inportant thread discussion to have on a site like THR. With so many new shooters (and carriers!
) and different configurations of firing mechanisms and safeties, an exhaustive discussion is CRITICAL. Thanks to all those Who are tryng to add coherent reasoning to such an important topic. I have been thinking about this a lot because I want a CHL for Tejas and would want to be able to respond to a bad situation quickly without complicated (read: two-handed) maneuvers.
BUT...
I have a pistol that (when a round is chambered) can be fired by ONE intentional or unintentional move. It is a striker-fired pistol without what I call a mechanical safety (i.e. one that prevents firing when the trigger is squeezed). Even with a grip "safety" (something of a misnomer in my opinion), something protruding into the trigger guard could cause a discharge when holstering/drawing the weapon. Firing should be an INTENTIONAL act, meaning it seems to me that TWO actions should be required to accomplish it, hopefully insuring that the intent of a person is required to fire the gun.
Now, my pistol can be handled more safely in some ways than others (as is true for all of them). It can be holstered/drawn without depressing the grip safety. This is an improvement but also more difficult and certainly does not prevent the grip from being depressed if one adjusts their grip. We're still left with a gun that can be fired by one movement. A Glock does not have a grip safety but a pistol that does is still not prevented from firing if the grip and trigger get pushed at the same time.
In my opinion a pistol that can be put "on safe" (where it wouldn't fire even if someone picked it up and squeezed it) but that can be fired with TWO one-handed moves (i.e. a safety release and a trigger pull) insures firing is an intentional act but one that can be accomplished quickly with one hand. I would be very nervous carrying a weapon that did not take an intentional move to put in ready-to-fire mode. Of course thumb safeties can be disengaged unintentionally, but at the same time I doubt anyone carries an autoloader chambered with the thumb safety OFF. I'm betting if they have one its engaged when the chamber is loaded. Thumb flick and pull the 'bang switch' and you're fully functional. I am kind of sad because I think I'll have to get a different pistol to carry if I choose to do so.
Oh well, an excuse to get a Browning Hi-Power!
For what it's worth, it's possible the dog activated the trigger with a claw or something, and the same thing could happen to pistol with a grip "safety" if it's being held. A thumb safety that has to be disengaged before firing seems the safest route. It's probably a function of the attempt to carry in an environment that is not by definition life-threatening. In battle, I'd guess something without a thumb safety would ALWAYS be carried in ready-to-fire mode.