What could potentially happen if the trigger spring fails in a single action revolver?

In a single action revolver, the operation of the firing mechanism heavily relies on the trigger and its associated components, including the trigger spring. When the trigger spring fails, it can prevent the trigger from being fully engaged, which in turn means that the hammer will not be properly cocked. This is essential in a single action revolver, as the hammer must be manually brought to the rear position, and the trigger’s function is to release it to fire the round.

If the trigger spring does not provide enough tension or fails entirely, the trigger may not return to its initial position after being pulled, or it might not move smoothly enough to engage the hammer fully. Consequently, the revolver will not be able to fire because the necessary steps in the firing sequence cannot be completed.

This failure disrupts the operational sequence specifically tied to the single-action mechanism, where each shot requires manual cocking of the hammer before the trigger can release it. Thus, the outcome of a failing trigger spring directly results in a failure to cock the hammer properly, leading to a situation where the firearm cannot be discharged.