Disassembled AND locked, he mentioned 'everything is doubled' for restricted even though it was a non-r class, he knows some of us are challenging today (its midnight here now). If its disassembled I'm guessing the lock is if the case is opened the gun can be easily assembled so at least at that stage there will still be a lock...
Disassembled isn't an option in the handguns you'll use in the test. It is only legal with bolt actions where you remove the bolt or bolt carrier. Lock the gun so it cannot fire and lock the case so it can't be opened.