Yes. However, you have to have a F.O.I.D. card by state law and Chicago has an ordinance that states you have to have it registered.
AND
It cannot be on this list:
http://calgunlaws.com/images/stories/Docs/McDonald/unsafe-roster-final.pdf
Holy Cow that is some list, 14 pages. One of my pocket guns is on there too. I never thought it was an unsfe gun, just finicky about it's ammunition.