Firearms that did work, Percussion cap! - Album on Imgur
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Percussion cap - Wikipedia
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LeBlanc: How and why to use black powder percussion caps
Percussion cap handgun (beginning 19th c.). SPAIN
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Long Colt pocket pistol, 1849, bullets for Remington New Model Army .44 percussion revolver, metal vial and lid for gun oil, tin percussion caps Stock Photo - Alamy
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