Quick update: Just heard from state police as to what they define an ammunition feeding device as and you guys were correct, they said it's "a magazine". That generally seems to be the definition since a magazine feeds a gun.
CA-compliant setup just finished. Fixed stock, finned grip, ambi safety. Not as uncomfortable as one might think. Really easy to shoulder and manipulate all features. Magpul BAD lever actually helps a lot too.
I've seen offset ones, idk the legality of them though. Are there any provisions written specifically addressing holes in the fin? You could just call it a thumbhole stock if the stock and grip were one piece lol...
Do you mean by law or physically? Because if the fixed stock and buffer tube can be separate parts, I don't see why connecting the stock to the pistol grip wouldn't be physically possible. But anyways, doesn't matter if thumbhole stocks were outlawed.
Although this would constitute a thumbhole stock, no?