1776 - American Revolution. 1807 - Percussion-detonating principle patented. 1825 ca. - Percussion-cap guns are in general use. 1830 - The back action lock appears. 1835 - The first Colt revolver.
Percussion therapy, which massage guns are known for, strikes the muscles repeatedly for deep, targeted relief. Percussion therapy reaches deeper into your muscles than vibration therapy ...
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