So when the door opens for any reason the pilot is supposed to pull out the gun and chamber a round? And when the door closes, the pilot is supposed to unchamber that round? How many times does the pilot do that? And then there is the issue of the time to chamber a round when the door is forcefully breached. IMO, it's safer to leave it loaded, with a round in the chamber, and the gun in the holster.
"B-B-But it-itzzz not suppose ta have a (snork) bullet in the buh-buh barrel thingy if you're not using it (sniff)".