Illicitly ‘homemade’ submachine guns feature very prominently in firearms seizures by police across South America, Brazil in particular. These weapons vary in their level of sophistication though a large number appear to be semi-professionally produced. In a recent study of over 14,488 firearms seized between 2011 and 2012 in Sao Paulo alone, 48% of submachine guns analyzed were reportedly homemade. Given the decent quality of many SMG clones, even that high statistic is probably significantly under reported.
http://www.thefirearmblog.com/blog/2...ne-guns-brazil