Allin, master armorer at Springfield Armory, perfected a forward-hinged breechblock that swung open like a trapdoor, earning its everlasting nickname. Commensurate with this was the development of the ...

The 1884 Springfield featured the Buffington rear ... 45 Colt were going to be close enough to get a sense of the original. The “trapdoor” is open and ready to accept a .45-70 round into ...