When Angela and Darryl were helping Kevin with the password for the copy machine, Creed is seen "working" at his usual desk, but he had already been moved into the manager room by then.
Dwight keeps a pet piranha in his office. It is illegal in many parts of the United States to possess an exotic animal; in Pennsylvania as well, they cannot be kept without a permit.
The gun Dwight displays and later carries around the office appears to be a Remington Model 1875, but is identified by Dwight as a Beaumont-Adams. The Beaumont-Adams is a very different looking British service revolver.
When Dwight receives his holster and begins carrying the Beaumont Adams revolver, Andy claims that he's extremely uncomfortable with guns. However, in a deleted scene from "The Duel," he is revealed to own a shotgun for hunting pheasants when he and Dwight are attempting to determine what weapons should be utilized in their duel.