Gun advocates will point out that these are unlicensed firearms and thus tightening regulations will not reduce crime. I agree with that.
At the same time, they rarely offer alternative solutions to reduce gun violence in our cities. We know from our neighbors down south that facilitating legal gun ownership isn't the solution either -- among developed nations they are unique in the amount of gun violence they suffer, and accessibility to firearms is obviously a large factor in that.
So, what can we realistically do about this?