Not a real mechanical twist of course! The ideal lower for my purposes would have a drilled and threaded buffer tube hole, trigger group cavity, but NO mag well cavity, NO mag release cavity. Is there a product out there which fits this description? It can be blemished as hell, I don't care, as long as I can drill fire control group holes and bolt it up to a custom upper which does not feed from a magazine (single shot bolt action).
Help much appreciated!