These are made by many underground manufactures, but they all have basic capabilities. They are, simply put, trash that posses nearly as much danger to the user as the target. They are, however, popular due to their disposable nature and total untraceability. The fact that they are single shot weapon is not a problem to most couriers, who really only need one shot (destroy the package). The fact that they are such pieces of trash means that if it must be ditched, there really is no money lost. Their cheapness is also a big consideration to the destitute, indigent and poor, along with criminals.