I contacted Geissele today about their HK rail. I was told by the woman on the phone that they have been released, but are out of stock. I was also told that they wouldn't do a back order or waiting list and that I would just have to check back later for availability. I understand that there could have been some confussion with the M4 rail, but I specified HK and she indeed confirmed that we were talking about the same rail. Does anyone have any information to confirm or deny what I was told? I was under the impression that these were not released yet.