This six shot improvised 12 gauge shotgun, which is incomplete, was seized by police along with Satan’s Plants by police in Brazil. On this crude example the drum is formed from multiple steel tubes welded together with a thumb screw below which is tightened to align and lock each chamber. The firing mechanism is missing.
“Walmer Detective arrested a suspect on 05/04 who was wanted for house robbery. Homemade gun & 13 rounds of ammo seized.” SA Police
Similar to the classic shotgun variation though arranged in reverse. It is made from three components which include a barrel pipe welded into a larger pipe and a length of steel bar with a nail in the end to act as a forward driven firing pin. Simple and highly effective.
A simple .22lr zip gun made from a cheap automatic center-punch tool seized in New South Wales, Australia.