IMO:
Carrying a dao pistol with no external safety is to my mind the same as carrying a revolver... No difference, same difference, whatever?
I think an external safety on dao pistol is the "solution to a non-existent problem". (sorry, I borrowed that line)
Every pistol/revolver I use for cc is da first rd., or dao...
IMO one of the reasons for the dao firearm in the first place is to preclude potential ad's...
Let me add (and this will po lots of folks) that the only pistol I've ever owned that scared me with dao is a Glock 26.... I simply never learned to keep my finger off the trigger like a good boy should.. IMO the "always light" trigger action on Glocks are best served when used by either professional leo's, or persons willing to become proficient with the unusual trigger action.
I'm not sure the average pistol owner does that.
And then you have the leo who was "professional" enough to shoot himself in the thigh with his 40cal Glock in front of a classroom full of young kids.. Guess he missed the "keep your finger off the trigger" aspect of his professional training.
Just an old fart opinion, but always have one in the tube, and NOT having a safety to worry about is just a bonus..
When and if the poop hits the fan the less things your mind has to worry about regarding whether your firearm is loaded, or on/off safety is a good thing.....
I'd worry much more about keeping your firearms stored safely away from kids when not in use than I would the absence of a unnecessary safety on a firearm with a dao heavy trigger pull...
But that's just me.
Best Wishes,
J. Pomeroy