Why is your safety on if your chamber is empty? Just one more thing to fumble with half asleep, and possibly without your glasses and adrenaline rushing
Because you asked... If I am not fully awake by the time I need to be pulling a trigger then maybe I shouldn't be pulling it.
If the adrenaline rush and the action of racking a round in the chamber doesn't wake you up enough, what would?
As others have said - cruiser ready - you need to keep it as simple as possible