My suggestion was to add additional licensing to rifles like the AR15, not ban it entirely. You’re still saying that not enough kids die from it to do anything at all, but you didn’t say how many would have to die for you to change your mind about that.
Regarding Chicago, almost every gun begins its life with a legal sale from a dealer. Straw purchasers then take those guns and resell them privately, or they get stolen from people that don’t secure their weapons properly etc. That’s a regulation issue that let these guns on the street in the first place. There should be no undocumented private sales, and the straw purchasers should be in jail. Your NRA doesn’t want to do anything that would stop this. Brilliant that you point to that problem to justify not doing anything about the mass shooting problem. Again, brilliant.