Which of the following is NOT one of the step-by-step rules for safe gun handling?

Ensuring that the barrel is clean is certainly an important aspect of gun maintenance and functionality, but it is not directly part of the fundamental rules for safe gun handling. The primary focus of safe gun handling rules is on practices that prevent accidents and ensure safety while handling firearms.

Controlling the direction of the muzzle is critical, as it prevents the possibility of pointing the gun at people or objects that could be harmed if the firearm were to discharge accidentally. Checking the action of the gun is essential for confirming that it is in a safe state before handling or firing. Holding the rifle with fingers outside the trigger guard emphasizes the importance of keeping fingers away from the trigger until ready to shoot, which significantly reduces the risk of unintentional discharge.

While maintaining a clean barrel can help improve performance and ensure that the firearm operates correctly, it does not fall under the immediate step-by-step rules that pertain to safety during handling and usage.