What is the first action to be taken when the command FIRE is given?

When the command FIRE is given, the initial action that must be taken is to disengage the safety mechanism of the pistol. The firearm's safety is a critical feature designed to prevent accidental discharge. Therefore, taking the pistol off safe is the first necessary step to ensure that the weapon can be fired effectively and safely when ready.

This step is essential as it allows the shooter to then prepare for the subsequent actions such as aiming and then pulling the trigger. Engaging the safety after having already aimed or attempted to fire would be counterproductive and could lead to unsafe handling practices. By prioritizing the disengagement of the safety, the operator sets the stage for a controlled and deliberate response to the command.