I live in IL, sadly I came across something stated that in Cook County, Illinois (Chicago) you can not own an AR-15. Is that correct or does it have to do with the rounds a magazine holds? Where would I find if other Illinois counties fall into the same restrictions? Obviously I'm not talking an automatic AR-15. I'm really thinking about building one from 'scratch.' One of my best friends is an Army Infantryman. He's taken many military level classes on firearms and has worked on a few ARs/M14s. So, if I need some help he'll definitely be there.