Map of the 2005 referendum about gun and ammo sale prohibition by municipality, colored by the option that received the most votes, and its percentage.
Map source: https://www.ibge.gov.br/geociencias/organizacao-do-territorio/malhas-territoriais/15774-malhas.html?edicao=27425

Data: https://www.tse.jus.br/eleicoes/plebiscitos-e-referendos/referendo-2005/quadro-geral-referendo-2005
Own work
RenanDummel