That many fewer guns in circulation means we will all be safer.
That is an unprovable premise.
Here is a thought experiment .
There would be hundreds of thousands of fewer guns immediately if police were ordered to destroy their wepons.
This huge number of guns fewer would make us much safer right?
Very much the same , a law that removed all the guns from responsible gun owners , no matter how many or few would have a negative impact on safety.
Laws that forbid guns to criminals are silly laws , I imagine that very strict guns laws cause much amusement to criminals as they break them.
Now lets make an experiment in the real world , lets doubble the number of guns in circulation over the course of two decades, and if crime rates (involving guns) fall then increased gun numbers are proven a negligable factor in public safety.
Oh hey , we have already performed this experiment in the real world!