The ornamental design for a disabling device for a revolver-type handgun, as shown and described.
FIG. 1 is a front and side perspective view of a disabling device for a revolver-type handgun, showing my new design and shown in operational association with a revolver-type handgun and padlock, both depicted in phantom outline and not parts of this invention;
FIG. 2 is a top view thereof, the unshown bottom view being of identical appearance;
FIG. 3 is a side view thereof shown in operational association with the cylinder of a revolver-type handgun, shown in phantom outline and not a part of this invention, the opposite side being of identical appearance;
FIG. 4 is a front view thereof, taken from the left of FIG. 2; and,
FIG. 5 is a rear view thereof, taken from the right of FIG. 2.