Abstract: A revolver pistol holster having a trigger-guard-retaining upper rearward top wall and a W-shaped spring mounted on holster upper forward opposing side walls biasing the holster upper-forward side-wall portions toward one-another, with a central portion of the W-shaped spring being mounted against a forward wall portion connecting the side wall, such that the forward wall portion at an upper location is biased toward the trigger-guard-retaining upper rearward top wall whereby a holstered pistol is biased into a trigger-guard-retained position within the holster, and an upper forward portion of an inward side wall having a major upwardly projecting portion serving as a thumb-brace facilitatable of drawing a holstered pistol grip-handle upwardly and forwardly.