What does it indicate if the hammer falls after squeezing the trigger in double-action mode?

When the hammer falls after squeezing the trigger in double-action mode, it indicates that the mechanism is functioning correctly. In double-action mode, pulling the trigger not only releases the hammer but also cocks it back in preparation for firing. This means that upon squeezing the trigger, the action should result in the hammer being released, firing a round as designed.

This functionality is a critical feature of double-action pistols, where the trigger's movement serves a dual purpose. A falling hammer in this context is expected and confirms that the internal mechanisms are performing as intended. In contrast to this, any indication of malfunction, a stuck trigger, or the need for spring adjustment would result in different symptoms, such as the hammer not falling or the trigger feeling unresponsive.