If I, for some unlikely reason, ever found myself on the ground in Chicago, perhaps I could understand a local ordinance limit of seven concealed handguns of various calibers, two open carry shotguns, one rifle, and three medium length knives.
Any more than that would invite suspicion by local authorities regarding my intent of self defense... Any less than that, I would not consider myself minimally armed for self-defense in Chicago. OK, yes the above is exaggerated. I would feel perfectly safe in Chicago with five concealed handguns and two knives.
You would be insane to travel the streets of Chicago without at least one crew serviced artillery piece.