Noun
a pistol with a revolving cylinder (usually having six chambers for bullets)
Source: WordNetA wounded Shane will ride off into the sunset in the snowy Grand Tetons, assured that the danger is past but knowing there is no place in a now-calm range for his six-gun that brought others justice and peace. Source: Internet
This gave an eight-gun broadside and six-gun head-on fire in either direction. Source: Internet