A fairly unique submachine gun seized last month which is chambered in .380 ACP, the same model having been seized on a number of occasions by police in Minas Gerais. It is constructed from bolted together sheet metal plates and appears to use a trigger / grip assembly taken from a speargun.
Two identical models with retractable stocks seized in Belo Horizonte in 2016.
Impro Guns 
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This appears to be the same style gun featured on the improguns.blogspot page in 2015 https://homemadeguns.wordpress.com/2015/09/02/unusual-submachine-gun-seized-in-brazil/
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