Flying with guns: What not to do
Airlines and the TSA are pretty humorless when it comes to flying with guns, no matter how funny you are, but that shouldn’t keep you from flying with one in your checked bag.
As part of my job, I spent a lot of time living out of suitcases. While I prefer to drive, on trips longer than a 500nm radius of Biloxi I wind up having to catch a plane– which I abhor.
As I generally like to carry wherever I am going, something that I have done virtually every day since about 1992, this gave me lots of sour experiences with airlines and, post-9/11, TSA.
My lessons learned in this lengthy article at Guns.com.
laststandonzombieisland 
You might want to consider “Air Courier Travel” which some Airlines and Freight Services offer. You’re essentially “Living Cargo” transporting Documentation from one place to another, and hand delivering the documentation too where it needs to be sent. Aircraft accommodations are rudimentary at best. A seat and Bathroom Facilities! No Windows and No Food or Drink Services…