The Hammer has become an albatross around the neck of Umarex, it would seem. It started out as a pump-action, then changed to a bolt-type action. The expected release date has been bumped back several times. In typical Umarex fashion, they have been very tight-lipped about the problems they are having. Some suspect that the Chinese production quality is the issue, and others have suspected design issues or flaws. Personally, I think they are having trouble making the rifle at the price they promised. The marketing people definitely got way too far ahead of themselves with all the publicity, which got a lot of people fired up and wanting a Hammer. Based on the release date that Umarex gave them, the sellers started taking pre-orders. Now they are caught in the middle, but only because they bought into the hype. If you want more information, check out Youtube and search for videos on the Hammer. Take what you see and hear with a grain of salt. After all, it's still not in production yet.
James