Abstract: A rotating lock lever assembly configured as an additional security feature for a holster and may be useable in combination with a first user actuable handgun retention mechanism and a second user actuable handgun retention mechanism. The rotating lock lever assembly may include a housing, a pivot portion pivotally mounted to the housing and an elongate member extending from the pivot portion. The elongate member may include a lever button portion and a blocking projection extending from the pivot portion. The blocking projection may have an engagement surface configured to engage with a protrusion portion of a thumb button of the second user actuable handgun retention mechanism when in the protrusion portion blocking position. The rotating lock lever assembly is configured for manual movement of the rotating lock lever assembly between a protrusion portion blocking position and a protrusion portion non-blocking position.