$50 shipped in CONOUS. Stock was lightly used. There is a bit of blue loctite remains on part of the receiver extension (from LocTiting the castlenut in place). Also there is a mark on the threads where the receiver end place goes. This mar does not prevent movement of the castle nut nor installation of the unit.
Edited to Add (and answer the questions):
Stock is Black, and stamped 'Rock River Arms'.
Buffer & spring ARE included.
Edited to update condition after full inspection.
Edited a 3rd time to add photos: