I don't see why the weapon needs to be locked away at all. What's wrong with either a shoulder holster or just leaving the weapon in the cockpit when the officer leaves?
Given the fact that the copilot could run the whole darn aircraft into the ground, I don't think his unauthorized access to a Glock is going to make a huge difference.
I just watched the video demonstration on Youtube. The whole padlock thing is friggin’ STUPID!!!! No wonder the gun went off, with the padlock pulling right up against the trigger.
“It’s not really the holster, it’s the TSA’s insistance on punching a hole in the holster for a padlock, and the hole is place so the padlock hasp fits behind the trigger.”
Is the padlock to prevent a weapon grab? If the pilots go through the same training as Air Marshals, surely they are versed in weapon retention. I think a level 3 holster would be much more practical and safer.