Condition 0
Fully ready to fire: round chambered, hammer cocked, manual safety off.
Condition 0 is the most ready state of a single-action pistol — round in the chamber, hammer cocked, manual safety OFF. The trigger is the only thing between the firearm and a discharge. Condition 0 is the state you transition through when you take the safety off mid-presentation. As a carry condition it’s avoided; as a moment-before-firing condition it’s the norm.