I never mentioned this, and I don't know if it will help on this thread (mods-remove it or "edit" as you see fit), but regarding Sacramento County: When I went to my OLL FFL to order 2 Stag-15's, I was behind a 30-yr. Veteran Sac County Sheriff (didn't get his rank) picking 3 Stags up for his personal Kali builds. He, at the time, seemed torn between doing the fixed mag thing, or the featureless way.(there was a U-15 sitting on a desk for another customer, and the LEO seemed very interested in it, he said, if he decided to go that route). Hope this helps a bit!
S.S.