When performing a function check on the M16/A2, what position should the selector lever be in to check safe mode?

To perform a function check on the M16/A2, the selector lever must be set to the "Safe" position to ensure that the weapon is not capable of firing. This is a critical safety precaution when handling firearms. In the "Safe" position, the weapon's firing mechanism is disengaged, which prevents it from discharging a round even if the trigger is pulled. This allows the operator to conduct safety checks and inspect the weapon without the risk of an accidental discharge.

Setting the selector lever to "Safe" also reflects proper handling procedures, promoting a culture of safety and responsibility among users. It is essential for maintaining control and ensuring that all safety protocols are followed, especially during inspections or maintenance tasks.