Which type of firearm action is typically characterized by the use of both a double action and single action mechanism?

The correct answer refers to double action semiautomatic firearms, which indeed utilize both double action and single action mechanisms. In this type of action, pulling the trigger performs two tasks: it cocks the hammer and then releases it to fire the round. This is characteristic of the double action function.

In a double action semiautomatic firearm, when the trigger is pulled, the system can fire the round without needing to manually cock the hammer first, which is where the double action aspect comes into play. After the first shot, subsequent shots are typically fired in single action mode, as the cycling of the slide automatically cocks the hammer for each subsequent round, allowing for a lighter trigger pull for those shots. This combination of firing methods provides flexibility and ease of use, allowing the shooter to have a smoother shooting experience with faster follow-up shots.

Other action types, such as double action only or single action only, do not provide the combination of features found in a double action semiautomatic. A double action only firearm allows only for double action firing with a heavier trigger pull for every shot, while a single action only firearm requires the hammer to be manually cocked before firing, making it less versatile in terms of action. Striker fire