Considering that guns keep being sold to people they absolutely should not be, a registry makes it easy for the FBI or ATF to get flagged when an "unallowed purchaser" attempts or succeeds to make a purchase. Then they can know to either confiscate (because of an illegal purchase) or start monitoring heavily. Previous mass shootings were by people who should not have been able to purchase, but lack of a registry allowed them to "slip through the cracks."
Another scenario - the FBI is monitoring radicalization in a small community. They check the gun registry to see which of the people in the community becoming radicalized are actual potential threats and zero in their investigation on those individuals, to prevent a shooting.
Etc. Basically just makes law enforcement's jobs more feasible.
The government doesn't have the resources to "confiscate" every registered gun owners' guns at the same time, and so we would be well aware if a confiscation by a tyrannical government is coming, and all of us weirdo militia folk and preppers would already be putting the sandbags out. Trust me, some of these guys are practically wishing for it.
Another scenario - the FBI is monitoring radicalization in a small community. They check the gun registry to see which of the people in the community becoming radicalized are actual potential threats and zero in their investigation on those individuals, to prevent a shooting.
Etc. Basically just makes law enforcement's jobs more feasible.
The government doesn't have the resources to "confiscate" every registered gun owners' guns at the same time, and so we would be well aware if a confiscation by a tyrannical government is coming, and all of us weirdo militia folk and preppers would already be putting the sandbags out. Trust me, some of these guys are practically wishing for it.