Air marshals use subsonic rounds that in the average case shouldn't fully penetrate the fuselage of an airliner at 30K+ feet, which could cause sudden decompression and would likely kill several passengers in the process. Not sure I would really want to have to remember to reload before the flight with "airliner safe" rounds to avoid turning my 737 into a giant flute.How about extended to include flying commercial airlines in the CONUS?