Pelican all the way.

My Pelicans have been to Argentina multiple times without a hitch. The beauty of them is they are water proof, tough as all get out, and you can get replacement foam when you change guns or equipment for the next trip.

Rather than the double breakdown shotgun case, I went with the AR-15 case. It's a little bigger and gives you plenty of room for packing other valuable goodies you'll be taking along with you.