Brazil's gun-ban referendum

According to this post, over at the Volokh Conspiracy, voters in Brazil are rejecting a proposed ban on the commercial sale or manufacture of all firearms and ammunition, except for police and military use.  The post includes a discussion of the Universal Declaration on Human Rights and the Catechism of the Catholic Church.  (The bishops in Brazil, apparently, urged voters to vote for the ban.  The author of the post asks, though:  "Surely the long Catholic tradition of the legitimacy of forcible self-defense is of some relevance in the rights-consciousness of an overwhelmingly Catholic nation"?)