We just secure them with security cable ties.
Any baggage handler wanting to steal from a case is going to have a knife or a pair of cutters anyway, all a lock does is stop a casual pickpocket.
The main problem in the US is that baggage claim is on the street side of the airport and security is limited to a mall cop who might check your ticket tags if he can be bothered. A nice shiny camera case going around the conveyor 10ft from the open door is the main risk.
I don't think you understand. When checking a firearm, the case must be locked. The TSA can't open it. If they see something suspicious on the x-ray, they call you and ask you to open it. To steal anything inside your luggage, the thief must either break the lock or take the entire case. They'll also have to deal with lots of officials trying to track down a stolen firearm.
The main problem in the US is that baggage claim is on the street side of the airport and security is limited to a mall cop who might check your ticket tags if he can be bothered. A nice shiny camera case going around the conveyor 10ft from the open door is the main risk.