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The Model 1873 was the fifth variation of the Allin trapdoor design, and was named for its hinged breechblock, which opened like a trapdoor. The infantry rifle model featured a 32 5 ⁄ 8 -inch (829 mm) barrel, while the cavalry carbine used a 22-inch (560 mm) barrel.
Springfield Model 1888, trapdoor mechanism open. In firearms, a trapdoor is a form of breech-loading mechanism for rifles in which a hinged breechblock rotates up and forward, resembling the movement of a trapdoor. [1] The Springfield models 1865 and 1873 were best known for first employing this type of action. [2]
The Springfield model 1884 was one of the "Trapdoor Springfield" rifles. It was an improved replacement for the previous longarm of the U.S. Armed Forces, the Springfield model 1873 and its variants.
Springfield Model 1870 – .50-70 caliber trapdoor rifle. [8] Springfield Model 1870 Remington-Navy – .50-70 caliber rolling-block rifle. [9] Springfield Model 1871 – .50-70 caliber rolling-block rifle. [10] Springfield Model 1873 – .45-70 caliber trapdoor rifle. [11] Springfield Model 1875 – .45-70 caliber trapdoor officer's rifle. [12 ...
The Springfield Model 1877 was a variant of the Springfield Model 1873 carbine. ... Prior to 1877, the trapdoor breechblock had a high arch machined out of it, making ...
Springfield Model 1866 breech. The Springfield Model 1866 was the second iteration of the Allin-designed trapdoor breech-loading mechanism. Originally developed as a means of converting rifle muskets to breechloaders, the Allin modification ultimately became the basis for the definitive Springfield Model 1873, the first breech-loading rifle adopted by the United States War Department for ...
This model is unique in the trapdoor series by being marked with the actual year of manufacture (1868, 1869, or 1870) on the breech-block. The 1868 marking is extremely rare with probably no more than 150 so marked; about 16,000 were marked 1869, with the remaining 36,000 being stamped 1870.
The result of the quest for a more accurate, flatter shooting .45 caliber cartridge and firearm was the Springfield trapdoor rifle. Like the .50-70, the .45-70 used a copper center-fire case design. A reduced power loading was also adopted for use in the Trapdoor carbine. This had a 55-grain (3.6 g) powder charge.