Abstract: A gun magazine holster system includes an upper section with a first wall, a second sidewall, and a third sidewall, the first wall, the second wall and the third wall forming a cavity and an opening; a locking device secured to the second sidewall, the locking device includes a housing; and a spring-loaded bolt; a hinge secured to the first wall; and a clip extending from an outer surface of the first wall; a lower section includes a bottom surface, a first bottom sidewall, and a second bottom sidewall; a bracket rigidly attached to and extending from the second bottom sidewall, the bracket having a hole extending through a thickness of the bracket and configured to engage with the spring-loaded bolt; and a quick-release device secured to the bottom surface, the quick-release device is configured to removably engage with a bottom surface of a gun magazine.