Which component of the M9 pistol sits between the firing pin striker and the firing pin?

The firing pin block is the component of the M9 pistol that serves a crucial role in the firing mechanism. It is designed to prevent the firing pin from moving forward unless the trigger is fully depressed. This enhances the safety of the firearm by ensuring that the pistol cannot accidentally discharge if it is dropped or subjected to impact when not in a firing position.

The firing pin block acts as a safety device that provides additional security against unintentional discharges. By incorporating this mechanism, the M9 can have a consistently reliable performance while maintaining rigorous safety standards.

In contrast, the recoil spring is involved in absorbing the recoil energy after a shot is fired, the guide rod supports the recoil spring, and the trigger mechanism is responsible for releasing the firing pin but does not specifically sit between the striker and the firing pin. Each of these components plays an important part in the overall function of the pistol, but the firing pin block is specifically situated to fulfill the safety function described.