Knight's discontinued the 870RAS in late 2004. They now appear to be collector's items, though in our experience they don't seem to work very well. We spoke to Knights about them at the 2005 SHOT Show, and they said the assembly was difficult to make (the barrel ring). We also suspect they were problematic in the field, and in any case Knights is pretty busy right now making rifle parts, so who needs the headaches?
