That reminds me of traveling with a weapon years ago.
I was at a major airport in Southern California. I walked up with my carry on and a rifle case to check in. The young lady at the desk looked quite frightened when I told her I was checking in a weapon. She thought that it was illegal, although I reassured her that it was not, she returned with a manager.
They verified that it was legal and asked me to demonstrate that the weapon was not loaded. I pulled the M1A out of the case and both of them looked absolutely panicked. I demonstrated that there was no magazine in the weapon and they told me good, put it back in the case. I advised them that if they were inspecting weapons, they should make sure there was no round inside the weapon. I drew back the bolt and showed them where the round was stripped from the magazine and showed them where the round would be if the weapon were ready to be fired.
I them turned loose of the bolt letting it slam home. To me that it a very happy sound, apparently they were not familiar with the sound because they both almost hit the deck. I put the weapon back in the case and locked it. I swear, they guy with her picked up the case like it was a snake and ran to the back.
Ha! Good story.