Abstract: A shoulder holster is disclosed to be worn outside an officer's shirt operably attaching to a chest strap worn under the Officer's shirt without making a hole in the shirt. An annularly shaped shirt lock hub having a circular groove formed in the interior opening attaches to the chest strap, all under the shirt. Outside the shirt, an annularly shaped shirt lock of four movable segments is held together by a circumscribing spring. Around the periphery of each segment is an outwardly protruding circular tongue. A cone-shaped retractable cylindrical expander resides just partially interiorly the central opening of the shirt lock. Immediately juxtaposed the shirt lock is an annular seal plate followed by a leather strap attached to the shoulder holster, the strap in turned followed by a backing plate.