The bar gun holster is a mechanical device. The bar gun holster attaches a bar gun to a counter such that the bar gun is readily available to dispense a beverage such as soda. The bar gun is a mechanical device that dispenses a plurality of beverages is a draught manner. The beverage dispensed through the bar gun is selectable. The bar gun further comprises a nozzle and a handle. The bar gun holster comprises a counter plate, an intermediate structure, a bar gun mount, and hardware. The counter plate and the bar gun mount attach to the intermediate plate. The hardware: a) assembles the bar gun holster; and, b) attaches the bar gun holster to the counter.