Hate to burst your bubble, but good luck finding any spares. I called S&W about buying an extra BCG and was told to send the rifle if there was a problem and that each BCG is unique to its own particular rifle ...something about bolt headspace, not sure if that was bull or just an excuse for lack of parts. Your best bet for spares that are not proprietary (check first before you buy) is DMPS or Armalite.
