The TSA locks can be opened by the TSA or anyone else who has the TSA keys.

According to federal law once you check the bag you are the only one allowed access to the locked gun.

Dont ever let the untrained agent put the unloaded firearm (steal me) tag on the outside of your bag or mark anything on the bag in any way identifying it as containing a firearm.

I had one airline agent ask me to prove my gun was unloaded right there at the desk in front of all the passengers behind me. It wasnt enough that I sign the declaration, nor show them the gun. I had to pick up the glock, and rack the slide right there in front of everyone.

Sure got alot of attention....... what a goofball agent!