Another mass shooting.....

[pocaracas]

And that's where Brian's prevention starts... at the factory, at the sale point.

People don't buy guns at or from the factory in the US Poca.  Direct to consumer is a sliver of sale, and not the sliver that concerns gun crime.  

You understand that, before guns arrive at the "used market" they must be new, right?
It seems far from possible to enforce any kind of control on the used goods market, so the best bet would be a generational struggle to close the tap upstream.

Stop selling them like candy NOW and the results will show up in 11 years, according to your stats.

Why, will the other guns go away or become less lethal?  If we want results, we need to reduce the number of desirable guns within the price range of the people who commonly employ them for crime..not the number of guns out of their price range and unavailable for purchase by the same people.

Well... yes they will become less lethal, as they age, rust and break.

I agree with you that such practices should also be employed. Also.

It's a long timeframe, but it's frankly better than do nothing, maintain the status quo, and in 11 years, we'll keep being bombarded by these news stories.

Whose talking about doing nothing?  I'm talking about tailoring our efforts to fit the data.  That's how you get results.

Your efforts are going for the largely uncontrollable P2P second hand market.
They could be controllable if the guns currently in circulation had been purchased with a proper registration and require that registration to be updated at a central location every time the gun is sold, like you'd do with a car (at least that's how we do it with cars where I come from).
Any crime committed with that gun would ultimately be traced back to it's registered owner, and no one wants to be guilty of a crime committed by their old guns, do they?
Start now! Implement this, if it's not already in place. Confiscate and destroy any unregistered weapon.

While, at the same time, constraining the ease of access to new guns.