The Four Rules of Gun safety are
1. Treat the Firearm as if it is loaded. When handling a firearm check and make sure you know the condition of the firearm. Then continue to treat the gun as if it is loaded.
2. Keep the gun barrel/muzzle pointed in a safe direction. Or Never let the gun barrel/muzzle cover anything your not willing to destroy.
3. Keep your finger off the trigger, until you are ready to fire. If your sight are off the target then your finger is off the trigger.
4. Be Sure of your target and what is beyond your target. (you don’t want to hit something behind your target)
I can explain a more on this. Maybe latter on I will break each one of them down and go into detail. Comment please if you would like that. These Four Gun rules apply even in gun fight. The still apply if you are a police officer.