Actually, one clarifying point that I am not sure about and haven't seen anything written about is whether the pilot actually has to leave the holstered weapon in the cockpit. Like I said, they used to use a gun safe in the cockpit before, so I would assume that they're still supposed to physically remove the locked holster from their belt when they leave the cockpit. Just another layer of defense if the cockpit is rushed while the door is unlocked. Some would argue that simply leaving the weapon in the cockpit should be sufficient, but the holster lock adds a time delay if someone ever did make it into the cockpit and found the weapon. They couldn't just grab it and immediately start firing with it--well, unless the lock is attached in front of the trigger, that is.