Discontinued 2016. The 455 Varmint Thumbhole is one classy rifle. A nutmeg-colored laminate, its stock is impressively ergonomic. The unique barrel uses the .866-inch profile of our 455 Varmint barrels, but is heavily fluted to take some weight out. While the heat-shedding ability of a fluted barrel isn’t as important in a .22 LR, it definitely makes for a good-looking rifle.