
The Springfield Trapdoor is a single-shot rifle manufactured at the US Armory at Springfield, Massachusetts, and served as the first standard-issue US military breech-loading rifle. The Trapdoor action involved a hinged breechblock that pivoted up and forward like a trapdoor to accept a cartridge. It represented the US military's transition from muzzle-loaders to metallic cartridge arms.
How does the Springfield Trapdoor compare?
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