I got into a discussion with my buddy yesterday about NFA weapons in California. He didn’t believe me when I said that AOWs are legal in California (with some restrictions). Calguns Foundation has a detailed page that discusses the legality of AOWs in CA, available here.
Does California allow possession of an AOW?
Yes. But it must be properly registered as AOW with a federal tax stamp.
OC Armory has an extensive selection of AOWs.
I have wanted to purchase an AOW for some time now but I’m still kicking the NFA trust idea around (along with being undecided on exactly which AOW I want to buy first). I do like the Remington MCS/Breacher, although it is expensive. The Saiga-12 AOW has the benefit of boxed magazines (not limited by a short magazine tube). But a side-by-side or over/under AOW is also pretty damn badass.