That's what I noticed too. You would think that if you wanted to stop or at least reduce violence in a city then job #1 would be to go after the people committing the acts of violence. Get them off the streets, and keep them off the street. No more revolving-door justice system.
Instead, they are apparently going to try to deny violent people the tools to commit acts of violence. I guess the thinking, flawed as it is, is that these violent people won't turn to other means to commit violent acts? Right...
Probably the worst thing that could happen would be for them to actually have some modest level of success at interdicting the supply of illegal weapons. With all those criminals still on the street, the demand will skyrocket. That will drive prices of illegal weapons higher. That will mean more theft, more illegal activities to pay the higher prices. That lucrative business of providing weapons will attract more criminals to get in on the action... Yeah, that's going to work out really well for the city... ;-/
The Mexican cartels will cash in. They can use the drug pipeline from the border to Chicago to ship firearms.