What does the term "double action" refer to in firearms?

The term "double action" refers to a firing mechanism in which pulling the trigger serves two functions: it cocks the hammer and then releases it to fire the round. This design allows for a more straightforward operation since the shooter does not need to manually cock the hammer before firing. As a result, it provides a quicker and more accessible means of operation, particularly in high-stress situations.

In firearms with a double-action mechanism, the trigger pull can also lead to more consistent firing, as it combines the actions into a single motion, reducing the need for precise manual cocking. This feature is particularly beneficial for self-defense and law enforcement applications, where speed and reliability are critical.

The other options do not accurately describe the concept of double action. For instance, methods of cleaning firearms and types of ammunition do not pertain to the mechanical functioning and operation of the firearm itself. Additionally, while safety features are significant aspects of firearm design, they do not relate directly to the firing sequence represented by double action.