Well, I don't need to, because you said you don't have a study. You're currently studying it.
Minister, I have an engagement paper that was sent out by your department in October of 2018. It directly states, under the heading “International experience”, that “In all cases the data does not conclusively demonstrate that these handgun or assault weapon bans have led to reductions in gun violence....”
Your own ministry recognizes that there isn't data to support your buyback argument. Why are you wasting billions of dollars on a scheme that hasn't worked?