Originally Posted by
SATTSO
For most types of luggage, zip ties will not help you keep track of when you bag was opened. In my opinion, hard sided luggage with no zippers are the most secure type of luggage. But nothing is perfect. A strap that locks wrapped around the body of your bag can really help, too.
Yep... and add a secure, hardened TSA proof lock to prevent theft. Completely legal and secure for flying in the US... if you have a "firearm" in the luggage and fill out the proper paperwork.
I use the methods described here when I travel and have to check valuable equipment.
http://deviating.net/firearms/packing/