This GPMG(General Purpose Machine Gun) was a prototype designed in Brazil for indigenous development, but was ultimately supplanted by FN MAG
The Firearm Blog has a good article on it
http://www.thefirearmblog.com/blog/2016/12/09/brazils-uirapuru-7-62x51mm-general-purpose-machine-gun-rare-bird-indeed/
From: The Firearm Blog
