The Springfield Model 1870 was one of several model "trapdoor Springfields", which used the trapdoor breechblock design developed by Erskine S. Allin. The Model 1870 was a minor improvement to the Springfield Model 1868, and retained most of the Model 1868's features. Note: Springfield Model 1870 may also refer to the The Springfield Rolling Block U.S. Navy Rifle, employing the Remington Arms Company rolling block design, and manufactured under a royalty agreement with Remington, for use by the United States Navy as a shipboard small arm.