A sledge hammer in the van or in the yard will evoke little suspicion. Flip the handle around, swap the shell from one end to the other and with these example you have a fully functioning 12 gauge shotgun.
Shotguns made by a 29 year old man who was arrested while trying to sell one of the weapons at a bus station in the Central Region of Rio Grande do Sul, Brazil. Each appears to be an improvement over the traditional improvised design with the addition of a ‘trigger’ type safety / barrel lock leaver.
Earlier this year police in Medina Minas Gerais received a call that a man was firing firearms on a public highway. Upon arriving at the scene police encountered a 52 year old man with a shotgun and after searching his house discovered four more homemade firearms. This quad barrel favela sweeper definitely takes pride of place.
In July, police in the city of Cherkessk in the Russian Federation arrested a 38-year-old homeowner who was charged with making these improvised revolving shotguns from a home workshop. Each 12 gauge shotgun consists of sections of steel pipe welded together with a Ghost Stapler functioning as a trigger.