While I would be in favor of preventing mass shootings -- in any number -- I'm not sure I believe UBCs could really do much, and I'd also be suspicious of how it would really be determined if they were being reduced.
Oftentimes events have numerous different causes. In the case of crime, a human-caused event, motives come from many causes, some more motivating than others.
The Odessa shooter failed a nics check but continued on and bought one via a private sale. This is great fodder for the Dems who push UBC laws , but if he'd been refused the private sale, do we assume "PROBLEM SOLVED!"
or, would he have driven his pickup into the front of a local gun store and stolen what he wanted.
Or bought some fuel oil and fertilizer and gone the Timothy McVeigh route?
We're informed by a media saturated with statistics and numbers. We're told we are experiencing an epidemic of gun violence no other country experiences .... except it's a lie. Other countries have mass killings, and murders. Russia has no second amendment. Just a higher murder rate.
Few media talking heads bring up Mexico, a country with severe gun laws .... and drug cartels virtually at war with each other, and often think little of killing police wholesale.
My point is:
When we DO get UBCs, and the numbers come in on their effectiveness, remember: IT'S A LIE.
They lie to us about no other "modern" (or ... whatever) country having a frightening murder rate.
They will lie about anything else.