Edited sentence: 40 S&W or.45 ACP.However, with the general public being unaware uf such "super-subcompact" guns, one must be aware that potential criminals may mistake such a small gun as being a "BB" or "Airsoft" gun and be fully prepared to discharrge if the situation warrants.Pocket pistols often lack the 'intimidation factor' of a full-sized 9mm or.Unwillingness to fire upon potential threats often results in escalated physical injury