What are the step of safety function check for M9 service pistol?

The safety function check for an M9 service pistol involves several key steps: First, ensure the firearm is unloaded by removing the magazine and visually inspecting the chamber. Next, with the pistol in a safe direction, engage the safety lever to the "safe" position and attempt to pull the trigger; it should not move. Then, move the safety lever to the "fire" position and pull the trigger, ensuring the hammer falls. Finally, perform a visual inspection of the mechanisms to confirm they are functioning correctly.