[Kreyzhorse]

A person should always hand you a weapon with the action open so that both parties can verify that it's unloaded. When you pickup the gun you should verify its empty and ease the action closed. It is generally considered bad form to let the slide slam forward unassisted, or to snap the cylinder violently closed on a revolver.

Want to check the trigger? ASK if its ok to dry fire the gun. Some people would rather you didn't. If they say ok then you do it once, possibly twice to check the SA and the DA trigger pull. Always make sure you do that by pointing the gun in a safe direction.

Always be gentle and careful with a gun that isn't your property. Handle it like a valuable antique.

Sound advice.