^ "Model 1880 Triangular Rod Bayonet Rifles".^ "Springfield Armory Model 1871 Rolling Block Rifle".^ "Springfield Armory Model 1870/1863 U.S.^ "Springfield Armory Museum - Collection Record".22 LR caliber bolt action training rifle. The Trapdoor gets its name from its top-opening, hinged breech, which is no paragon of strength but adequate for the hottest black-powder loads of its heyday, and for many normal 45-70 loads of today, or at least reproductions are. Use mounting screws (ORI-332) for this sight. It will also fit all Models including 1873, 1877, 1878, 1879, 1884, 1888 Springfield Rifles and Cadets. It was designed for the early Model 1873 rifle or cadet.
![williams diopter sight for 1873 springfield trapdoor 45 70 williams diopter sight for 1873 springfield trapdoor 45 70](https://www.riverjunction.com/assets/images/productimages/oneofakinds/3318-45/1873carbinetrapdoor-9.jpg)
armed forces from 1873 until it was supplanted by the Krag around 1892. The ladder flips up easily and the elevation slide works great This is an original Springfield Model 1873 45-70 Trapdoor rear sight. 30-40 caliber Krag–Jørgensen bolt action rifle. The Trapdoor Springfield has a golden history, having been used by the U.S.
![williams diopter sight for 1873 springfield trapdoor 45 70 williams diopter sight for 1873 springfield trapdoor 45 70](https://i.ebayimg.com/thumbs/images/g/k64AAOSwyMVdsiBa/s-l300.jpg)
![williams diopter sight for 1873 springfield trapdoor 45 70 williams diopter sight for 1873 springfield trapdoor 45 70](https://www.lodgewood.com/assets/images/img_0137.jpg)
The term Springfield rifle may refer to any one of several types of small arms produced by the Springfield Armory in Springfield, Massachusetts, for the United States armed forces.