With absolute certainty? No. I do think the evidence points strongly to the efficacy of gun control legislation and I think intelligent policymakers should look to it.
When you look at the response in the time frame following the passage of the Brady Bill, assault weapon ban, repeal of the ban, repeal of waiting lists, passage of the firearms protections act, the australian semiauto ban, etc. They all get the effects that were intended by the policy. Unfortunately, your masters have gone a long way in preventing the tracking of most individual guns so anything other than the most general analysis is by definition incomplete.