Which of the following is NOT one of the four primary rules of firearm safety?

The four primary rules of firearm safety are crucial for ensuring the safe handling and use of firearms. Among these, treating every firearm as if it is unloaded is one of the fundamental principles. This rule emphasizes the importance of always assuming that a firearm could be loaded, regardless of the circumstances. Such an assumption helps prevent accidental discharges, as it encourages vigilance and caution at all times.

The other three rules also reinforce safe practices: keeping your finger off the trigger until ready to shoot helps prevent unintentional firing; never pointing a firearm at anything you do not intend to shoot promotes safety regarding where the firearm is directed; and being sure of your target and what is beyond it prevents potentially tragic consequences from shooting at something unintended.

In summary, treating every firearm as if it is unloaded is indeed one of the primary rules of firearm safety, highlighting its importance in firearm handling protocols.