Notice also....
That POLICE guns are EXEMPT! (If I am in error, please disreguard the following argument)
If this is such a good thing, why don't police guns have to comply also? Imagine the benefit, if it works the way they say it will! Whenever there is an officer involved shooting, position of the empties will tell us right away, which officer's gun fired which shot(s). Think how well this could help when there is a confusion about who did what, and whether or not it was proper. In fact, what they ought to do is dump the micro stamping for civilians, and require it for all the cops! Think about it! With only cop guns microstamping, they could rule out the police right away for most shootings! (or not, as the case may be).
If I owned a gun company, my first act would be to look at what kind of market CA actually is to me, and my second act would be to (politely) say something like, "sorry honest citizens to California, your govt doesn't trust you, and forces us to stop selling our product to you because of the cost imposed in meeting their arbitrary requirements. And to those idividuals who work for CA police agencies, again, sorry, we just can't afford to do business with you anymore, as your political masters have just screwed you and us over. Good Luck."
I really feel sorry for the people in CA, who can't or don't want to leave, and who can't get their voices heard through the elective process. Oh well, at least (except for the mudslides and fires) you have nice weather!