Most of us are familiar with the external thumb safety mounted on the rear of the gun's frame or on the slide, depending on the handgun's.
Pros it helps prevent accidental discharge of the weapon. Con if you do not have your muscle memory built up that you release the safety when.
Glock firearms, for instance, are referred to as “Safe Action” pistols and Colt s and clones have both a manual thumb safety as well as a.
Whether one prefers an external mechanical safety on a pistol or not, is a Armory Range Officer Elite 10mm has a “classic” thumb safety.