I'm new, so forgive me if this is an old topic (figure it has to be but tried looking & came up empty).
For concealed carry, all the prevailing wisdom seems to point to not bothering with a safety and carrying a topped-off mag with a chambered round.
For a newbie like me, can someone tell me if and when a safety is even desirable?
Thanks for any input.
This largely depends on your training.
I'm a 1911 guy: my training and experience make operating a thumb safety just part of the manual of arms in gun handling.
I most frequently carry a Colt Commander (the Commander is the light weight model, the Combat Commander is all steel) concealed: cocked and locked, round in the chamber with full magazine. In over 35 years, the thumb safety has NEVER disengaged inadvertently.
Of course, I've accumulated many, many thousands of repetitions presenting the firearm (drawing from the leather) so operating the thumb safety is a matter of muscle memory for me.
For me, a pistol with a thumb safety is always more desirable than a pistol ('pistol' is the designation for semiautomatic handguns, the term doesn't include revolvers) without a thumb safety.
Overall, there are many more accidental discharges (ADs) with Glocks and other pistols incorporating some form of trigger safety than with pistols equipped with thumb safeties. Most commonly, these ADs occur when holstering the pistol- finger in the trigger guard is the culprit. This stems from inadequate training and practice.
You'll undoubtedly hear from folks who will lecture about how many safeties are incorporated into trigger safety pistols: that's truly irrelevant. The issue is training and practice: lots of training and practice without regard to type of safety.
For the majority of civilians who want to carry concealed but don't have good training and don't or can't practice their presentation A LOT, a revolver makes sense from a safety perspective. Revolvers are much less likely to accidentally discharge than pistols.
To summarize: for me, a thumb safety is very desirable. So much so that I prefer them to non thumb safety pistols.
Revolvers require more work to learn to shoot well than most pistols but are much safer than pistols in the hands of a newbie to handguns.
Lots of folks say that they don't use the thumb safety on their pistols. These tend to be folks who haven't had adequate training or won't put in the work to learn the manual of arms of their pistols.
These folks rationalize that they don't want to have the additional complication of operating a thumb safety in the heat and stress of a self defense situation.
With adequate training and practice, this just isn't an issue. Operating a thumb safety isn't 'just one more thing to think about'. It is something that happens automatically with adequate practice presenting the handgun.