Mississippi Code Title 97. Crimes § 97-37-31

It shall be unlawful for any person, persons, corporation or manufacturing establishment, not duly authorized under federal law, to make, manufacture, sell or possess any instrument or device which, if used on firearms of any kind, will arrest or muffle the report of the firearm when shot or fired. Any person violating this section shall be guilty of a misdemeanor and, upon conviction, shall be fined not more than Five Hundred Dollars ($500.00), or imprisoned in the county jail not more than thirty (30) days, or both.