I saw a uniformed security guard using an inside the waist band holster. The clip was attached to the belt but the gun/holster was worn outside like a real holster. It was a cheap nylon one. Retention value level -1.
Because when they pull the trigger on a enemy/terrorist they don't have worry if the round is chambered. If a firearm is a tool in your line of work would you not check to insure it's got one in the chamber before you go start the day?