What type of action allows for a round to be fired with minimal delay after pulling the trigger?

The type of action that allows for a round to be fired with minimal delay after pulling the trigger is double-action. In a double-action firearm, pulling the trigger serves two functions: it cocks the hammer (if it's a hammer-fired firearm) and then releases it to fire the round. This means that the shooter can fire a shot simply by pulling the trigger without needing to perform any additional steps, like manually cocking the firearm beforehand.

This feature is particularly advantageous for self-defense situations, where quick action is crucial. Double-action systems enable the shooter to achieve a rapid succession of shots, as opposed to needing to first cock the hammer as is necessary in single-action firearms. In contrast, a semi-automatic action, while allowing quick follow-up shots after the first trigger pull, operates in a different manner by chambering a new round automatically after each shot is fired but still requires the trigger to be pulled for each firing sequence.

Understanding the distinctions between these types of actions is essential for safe handling and efficient operation of firearms, particularly in a hunting or self-defense context.