Firearms must be packed in a locked manufacturer's hard–sided container specifically designed for the firearm, a locked hard–sided gun case, or a locked hard–sided piece of luggage. Handguns may be packed in a locked hard–sided gun case, and then packed inside an unlocked soft–sided piece of luggage. However, a Conditional Acceptance Tag must be used in this case.
Also, can I package the ammunition in the locked firearm case with the firearm? I thought I read on UCC that it has to be separate from the firearm, but this is what Delta's site says:
You can bring pistols and accessories as checked baggage as long as they are included in one pistol case and contain:
A small pistol tool case
No more than 11 lbs. (5 kg) of ammunition