Why don't you show me the exemption?
BTW, the federal hegemony you feared so much has arrived in Chicago.
Chicago Gun Case
Chicago probably has some Crips and Bloods, maybe even some with no felony convictions, so leaving aside your silly question of whether § 311 applies to them, let's get to the core question, and the only relevant one in a gun thread:
Does the 2nd amendment apply to them?