Unfortunately the founding fathers had good intentions when they initially added the second amendment for affording citizens the right to bear arms.
There are definitely way to many guns out there. However I have no idea how they would implement a scale back, as only law abiding folks would abide by any changes and there would not be a decrease in gun crime.
You scale back by limiting the amount/type of guns for sale.
You limit the amount of ammo that can be sold.
You register every weapon.
You have a buy back program where no questions are asked.
You bar anyone with any sort of record or diagnosed mental health issue from owning a gun
You deescalate armed police in society and schools.
You ban the private sale of guns.
You could even make insurance mandatory for gun owners.
You crack down on interstate travel with guns.
Put strict training in place for gun ownership.
Have inspections to see that guns and ammo are stored properly
You introduce laws that restrict your right to own a gun if you have stored or used one irresponsibly.
This still means that anyone who is of sound mind with no criminal background can own a gun.
There is still an issue with illegal guns (a buy back might help)
But the list above would drastically reduce suicide by gun and mass shootings.
It would also reduce the prevalence of guns in society and start rolling back gun culture without infringing on 2A rights.