Why a single shot, now after 150 years we finally got decent autoloaders and revolvers?
That would be a 12 gauge
If you're going to use a single shot gun in a fight, at least make it in a one shot stop calibre.
While most fights are resolved in a few shots or less I'd really like to have more than one on hand... Not to mention the fact that many autos and revolvers aren't much larger than that silly thing. In this case "unique" seems to be a polite way of saying lame.
a modern version of the liberator
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