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

The firing pin block is the component that sits between the firing pin striker and the firing pin in the M9 pistol. Its primary purpose is to enhance safety by preventing the firing pin from moving forward and striking the primer unless the trigger is fully depressed. This mechanism adds a layer of protection against accidental discharges, ensuring that the firearm will only fire when intended.

The design of the firing pin block is critical, as it blocks the firing pin from engaging until certain safety conditions are met, such as proper trigger pull. This is important for both the functionality and safety features of the firearm, making it less likely for the weapon to discharge unintentionally during handling or when dropped.

The other components, while important to the overall operation of the pistol, do not serve this specific function in directly interfacing with the firing pin and striker. Consequently, understanding the role of the firing pin block is vital for recognizing how safe handling and operation of the M9 is achieved.