What is considered the backbone of a pistol?

The action of a pistol is indeed considered its backbone because it encompasses the mechanisms that load, fire, and eject the cartridge. The action includes all the moving parts that facilitate these operations, making it critical for the overall functionality and reliability of the firearm. A well-designed action ensures that the pistol performs correctly, whether it is semi-automatic or revolver.

In this context, while other components like the trigger, barrel, and safety mechanism are essential for the operation, they each serve specific roles. The trigger is primarily responsible for initiating the firing sequence, the barrel channels the bullet and provides accuracy, and the safety mechanism is intended to prevent accidental discharges. However, without a properly functioning action, these components cannot work effectively, highlighting the action's fundamental role in the operation of a pistol.