There may be someone out there with a private HK collection to match this one. I don't think so, however. 'The Grey Room' was put together in an attempt to get many of HK's firearms in one location. I would have to say many and not all, because HK says that this is only a fraction of what HK/Oberndorf manufactures! The Grey Room is located at the Sterling, VA facility. Enjoy your tour. Another first at HKPRO. Get used to the word 'rare.' It is used liberally on this page. Update: 7/2007: This photographic tour is of the old Grey Room in the Sterling, VA facility. HK has reassembled the Grey Room in the new Ashburn facility, but I have not obtained photos of it to share here. I need to get up there!