[3][4][5] In 2004, he began to dedicate himself fully to the area of public security when he founded the Non-Governmental Organization Movimento Viva Brasil, which has the purpose of defending the citizen's right to own and bear arms, in addition to combating policies and theses related to disarmament.
[6] In 2005, he was invited to join the Parliamentary Front for the Right to Self-Defense and became one of the most important leaders of the victorious campaign for "No", in the referendum held in 2005 in relation to article 35, which deals with the restriction on trade in weapons and ammunition, of Law No.
[9] Since 2012, he started to defend the House of Representatives Bill 3,722/2012, authored by federal deputy Rogério Peninha Mendonça (PMDB/SC), which proposes a new weapon control system, revoking much of the content of the current Disarmament Statute.
[10] According to him, "more rational and convergent with the popular will, giving back to the citizen the possibility of self-defense and returning to the variants of public security the criminal inexistent fear of the victim's reaction today".
To this end, he has frequently participated in public hearings in the National Congress in defense of the project, in addition to several exhibitions and debates related to the theme at events across the country.
[11][12][13][14] In November 2014, Barbosa participated, with members of the Defense Institute, in the public hearing on weapons in the Chamber of Deputies in Brasília to address bill 3,722/2012 that was trying to revoke the "Disarmament Statute [pt]".
According to Andreassa, the people who participated in the documentary have thoughts that reflect opinions from both sides of the political spectrum, that is, against and in favor of civil disarmament.
[24] In September 2017, he was invited to the XXX meeting of the Mercosur working group on firearms and ammunition, which took place at the Itamaraty Palace, in Brasília.