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There is no real limit (other than practicality) of the smallest gun you can own. The smallest caliber firearm I now own is a .17 HMR. The smallest physical size is a Baby Hammerless revolver from 1920. It is a .22 Short revolver that is about 4.5 inches long, and was made to fit in a vest pocket. There ARE smaller guns.

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14y ago

What else can I help you with?