Abstract: A shot gun flotation device includes an inflatable arrangement comprising a water sensitive mechanism; an inflatable bladder; and a source of gas for inflating the inflatable element. Housing has a first tubular section attached to the shot gun, a tubular transition section, and a second tubular section for housing the inflatable arrangement. A further embodiment comprises an attachment adapter, a frame, and a sheath. The attachment adapter includes a first end section with threads for attachment to the shot gun, a middle section for mounting a ring, and a second end section with external threads for engaging the frame. The frame supports an inflatable arrangement and a sheath houses the inflatable arrangement and the frame when in an inoperative state. Further embodiments include an inflatable arrangement with a bladder stored in housing and a CO2 cartridge for inflating the bladder when the inflatable arrangement is activated.