The Court of Appeals opinion is a good one. It sounds like the trial court just wanted to deep six the case.
Glad to be in Arizona. When the California legislature came up with the idea of microstamping firing pins, the objection was made that it'd be very easy to deface or remove the microstamp. The legislature then came up with the brilliant solution to that: require the manufacturer to put a second microstamp inside the handgun (with no requirement that that one do anything). And to think they let those legislators not only walk the street, but also to drive a car.