After checking a firearm in with American at indy, they stapled a firearms check tag to my boarding pass. TSA held me on the secure side of the checkpoint until my firearms cleared tsa. DFW required me to be escorted to the TSA check room where they swabbed the handles and put a clear tag on it, then the ticketing agent walked back to the counter with me where she printed my boarding passes. I highly suggest a pelican style travel case with two locks. Some airlines allow ammunition in magazines, not inserted into magwells, others American, require ammo to be in factory boxes or specialized plastic storage boxes, no loaded magazines are allowed to be checked.