A quick and dirty improvised firearm assembled using pipe fittings available at any hardware store. Ammunition in this case has been improvised using nail gun charges with the crimp removed and a lead projectile inserted. The weapon functions by pulling back the ball end of the spring loaded striker bar and releasing to fire.
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.
An improvised firearm reportedly of a type used to murder British MP Jo Cox yesterday. The suspected shooter allegedly owned a copy of US Army ‘TM-31-210 ‘Improvised Munitions Handbook’ published in 1969 which contains detailed instruction on how to construct various simple homemade guns including the pistol pictured. The pistol is assembled from a 1/4″ pipe coupled with a plug fitted with a nail to act as a firing pin. It is fired by pulling back and releasing a metal strap which is powdered by multiple elastic bands wrapped in place. Reportedly the designs were extensively tested in trails and deemed safe enough to publish for official use.