Be very sure the firearm is unloaded. I went to a gun shop Saturday and picked up a shotgun to look at, as I was checking it out my buddy says that thing has a shell in it. Sure enough, there was a shell in the magazine! Very weird feeling, I ejected the shell and gave it to the guy behind the counter. He did not say a word, no thank you or anything. If it were my shop I would have checked.every gun on the floor right then!