In Mississippi, if you wish to carry a concealed pistol or revolver, you must obtain a permit to do so. There are also several other situations or professions that require individuals carrying firearms to obtain a special permit. Resources and procedures to apply for permits are available here.
URGENT: “The Department of Public Safety is authorized to enter into a reciprocal agreement with another state if that state requires a written agreement in order to recognize licenses to carry stun guns, concealed pistols or revolvers issued by this state.”