The 1855 Revolver That Started Double Action / Single Action

This week’s Stump My Nephew question digs into the first true double-action/single-action firearm. Sam works through the clues, explores early DA/SA history, and eventually gets hit with the answer: the 1855 Beaumont-Adams revolver.
If you love gun history, mechanical evolution, and obscure trivia, this is a good one.

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