A revolver, comprising: a frame ; a yoke mounted on said frame and movable about a pivot axis between an open and a closed position, a recess being positioned within said yoke ; a cylinder mounted on said yoke ; a detent mechanism , comprising: a housing mounted on said frame adjacent to said yoke ; a pin bore positioned within said housing , said pin bore extending longitudinally along a pin bore axis ; a pin having a tip , said pin being positioned within said pin bore and movable along said pin bore axis between a first position, wherein said tip projects from said housing and engages said recess when said yoke is in said closed position, and a second position, wherein said tip is within said housing ; characterized by : a plunger cavity positioned within said housing and intersecting said pin bore , said plunger cavity extending longitudinally along a plunger cavity axis , said plunger cavity axis being oriented transversely to said pin bore axis ; an action surface positioned on said pin , said action surface being oriented transversely to said pin bore axis ; a plunger having an end , said plunger being positioned within said plunger cavity and movable along said plunger cavity axis ; a spring positioned within said plunger cavity and biasing said end of said plunger into engagement with said action surface of said pin . a frame ; a yoke mounted on said frame and movable about a pivot axis between an open and a closed position, a recess being positioned within said yoke ; a cylinder mounted on said yoke ; a detent mechanism , comprising: a housing mounted on said frame adjacent to said yoke ; a pin bore positioned within said housing , said pin bore extending longitudinally along a pin bore axis ; a pin having a tip , said pin being positioned within said pin bore and movable along said pin bore axis between a first position, wherein said tip projects from said housing and engages said recess when said yoke is in said closed position, and a second position, wherein said tip is within said housing ; characterized by : a plunger cavity positioned within said housing and intersecting said pin bore , said plunger cavity extending longitudinally along a plunger cavity axis , said plunger cavity axis being oriented transversely to said pin bore axis ; an action surface positioned on said pin , said action surface being oriented transversely to said pin bore axis ; a plunger having an end , said plunger being positioned within said plunger cavity and movable along said plunger cavity axis ; a spring positioned within said plunger cavity and biasing said end of said plunger into engagement with said action surface of said pin . a housing mounted on said frame adjacent to said yoke ; a pin bore positioned within said housing , said pin bore extending longitudinally along a pin bore axis ; a pin having a tip , said pin being positioned within said pin bore and movable along said pin bore axis between a first position, wherein said tip projects from said housing and engages said recess when said yoke is in said closed position, and a second position, wherein said tip is within said housing ; characterized by : a plunger cavity positioned within said housing and intersecting said pin bore , said plunger cavity extending longitudinally along a plunger cavity axis , said plunger cavity axis being oriented transversely to said pin bore axis ; an action surface positioned on said pin , said action surface being oriented transversely to said pin bore axis ; a plunger having an end , said plunger being positioned within said plunger cavity and movable along said plunger cavity axis ; a spring positioned within said plunger cavity and biasing said end of said plunger into engagement with said action surface of said pin . <EOS>