Mississippi Code Title 97. Crimes § 97-37-33

If any person shall sell, or offer, or expose for sale any toy pistol, or cartridges, or other contrivance by which such pistols are fired or made to cause an explosion, he shall be guilty of a misdemeanor, and, upon conviction, shall be punished by a fine of not less than five dollars nor more than twenty-five dollars, or by imprisonment in the county jail not less than three days nor more than thirty days, or both.

It is expressly provided, however, that nothing herein shall be construed to prohibit the sale, or offering, or exposure for sale of any toy cap pistols, or other devices, in which paper caps manufactured in accordance with United States Interstate Commerce Commission regulations for packing or shipping of toy paper caps are used or exploded, and the sale of such toy cap pistols is hereby declared to be permissible.