There are some special editions out there but very hard to get, as they are not typically made for the US market or imported to the US. One is the 527 ebony. It has a rosewood endcap and twisted barrel. There is a recent post about it here. There is also a 527 royal only offered in .223 though. From what I hear there a few that snuck in. It has a very interesting looking stock and has a twisted barrel and jeweled bolt. Personally, I'm after the 453 lux. Looks just like a 550 or 527 lux with Bavarian style checking and walnut storm with sst trigger. Only being sold in Europe though.