You carry it cocked and locked (thumb safety engaged) with a round in the chamber. Or you could carry without a round in the chamber.
As for decocking: drop the magazine, rack the slide to eject the chambered cartridge, and then you can do whatever you darn well please (like pulling the trigger to decock). Double-check that the chamber is empty first.
As for decocking: drop the magazine, rack the slide to eject the chambered cartridge, and then you can do whatever you darn well please (like pulling the trigger to decock). Double-check that the chamber is empty first.