The stocks for the Montanas are the same, built in Costa Rica for Kimber. The earlier ones had a smoother gray colored paint, later replaced by a more sandpapery textured gray colored paint, and currently made with the greenish colored sandpapery textured paint. I’ve had eight Montanas, including a first year, two position safety, 7mm-08, and the stocks have all been the same, save paint texture and color. The camo stocks (like on the Adirondack) are also the same stock, only with the rubberized camo finish on them (the Hunter based camo stocks are plastic).
Not exactly sure what year they went from the smooth gray paint to the sandpapery gray paint, but it was definitely prior to 2016. Maybe someone else can nail down the year for you. If you are interested in buying a particular montana, say with the sandpapery finish, I would ask the seller about it before you buy it.
