Abstract: A security system for use in a pistol holster for the selectable engagement and disengagement of the trigger guard of a pistol or gun. The system, more particularly, includes a segment of a resilient material having a free first end and a second end rigidly affixed to a lower internal co-planar holster surface facing away from the torso of the user, the first end defining a substantial U-shaped portion within a plane substantially transverse to the internal surface of the holster, the U-shaped portion proportioned, in geometry and resilience, to engage the trigger guard responsive to an application of downward pressure upon the first end of the segment by the trigger guard. The security system further includes an element for selectable urging the U-shaped portion of the segment off of the trigger guard responsive to pressure applied onto the top of a release element slidably secured within the holster surface.