they also make guns that are distributor specific. Say Lew horton or Davidsons decides that they want to buy say 250 Model 7's with a 20 inch barrel, mannlicher stock and say chambered for 6.5 carcano, Remington will make that run, it will never show up in a catalog, it will not show up on the web page. But there they are at the local gun shot. I have bought Winchesters, Remingtons, S&W's and Rugers that never show up in the catalog but only on some distributors broadsheets.
Its all business, and they love to make new and different things but htey love it more when someone else takes the risk, lets say we decided to do a group buy on something odd, like say a 700 with a 28 inch heavy barrel stainless fluted on a blued action, with a grey kevlar stock, chambered for 257 AI roberts. Now, provided we had an FFL who acted for us, and we had fronted enough cash to the FFL to keep their attention, we could get that combination made.
Buy the way, that 6.8 spc tactical, has the part number #rem27503 and its from Davidsons.
and if you want the sweetest S&W ever the 8 shot registered magnum in deep blue, is #S&W170271FC for the 3 1/2 inch and #S&W170272FC for the five inch, from hortons.