History and Design
Originally, the trapdoor Springfields were created to convert Model 1863 SpringfieldSee also
*References
*"The .45-70 Springfield, Book II, 1865-1893, Albert Frasca, PhD, Frasca Publishing *"The .58 and .50 Caliber Rifles and Carbines of The Springfield Armory, 1865-1872", Richard A. Hosmer, North Cape Publications 2006 Rifles of the United States Early rifles Hinged breechblock rifles Springfield firearms Guns of the American West