Aww Cali you unconstitutional tool...
Microstamping might be helpful to law enforcement except the technology does not consistently imprint identifying information on ammunition.
calmatters.org
I didn't know that for every handgun added to the approved roster three have to be removed, they're trying their best to remove guns from the criminals aren't they.
The roster has gone from 953 to 496 handguns since the bill was in effect with no new handguns being added.
Edit: my bad, in the 7 years of this in effect, the M&P 9mm has been added on 10/20/2020. So 457 handguns banned, and 1 added.