These will fit and function perfect on all Springfield 45-70 Carbine, Rifle or Cadet Trapdoors. It is notched for the Buffington rear sight.

It will also function perfect with any of the other model sights, including the model 1873, 1877, 1878, 1879, 1884 & 1888 Springfield Carbine, Rifle and Cadet Rear Sights.