Thirty days... only...
Thirty days is just to allow the state time to appeal. Once the state appeals, the stay will be indefinite. It will take a couple years, and the 9th will likely reverse Judge Benitez. A couple years later, SCOTUS may decide to hear the case, or not...
Judge Benitez's slapdown of CA's magazine capacity limit in Duncan v Becerra was 2 years ago, and it was recently upheld by a 9th Circus 3 judge panel, only to be vacated again. Now we wait for an en banc review by the full 9th. All the while, the stay remains in place, and Californians are denied 2nd amendment rights.
Now, if the en banc review of Duncan v Becerra goes our way, then the AWB might go down in flames also. That's the case to watch and see where the 9th stands.