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Old January 7, 2013, 07:54 PM   #12
ClydeFrog
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Join Date: May 1, 2010
Posts: 5,798
Web beat me to it!...

Drat!

The Swiss mini gun is the smallest working firearm I know of.
As for factory produced firearm loads, I'd guess & say the .17 caliber.
There may be a Warsaw Pact or Asian round smaller too.

Clyde
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