I have a compleat Rock River lower so all I need is the stock. I don't think I need the buffer or springs, ect. If I am wrong, let me know. Used is fine as long as it is in great shape. The rest of my gun is like new so I want to keep it all looking about the same in terms of finish wear.
I also would buy a grip from the same person if they had one I liked. The fobus or Hogue type is what I am after.