I recently took my CCL renewal class and during it the instructor told us about a defensive incident he was involved in (no shots fired) in the city of Chicago. While he was legal in handling the situation, the CPD were giving him a hard time and trying to charge him with having mags that exceeded Chicago's limit. Based on the information presented to me when I was originally licensed, I thought that handguns were preempted under the CCL law thus making these mag limits inapplicable if you have a CCL.
Can someone shed some like on this issue for me? Did CPD have their wires crossed on this info or do it?