Scrapgun
This weapon's design is... less than ideal. Cheap, certainly, but less than ideal. Add 1 UNRELIABILITY point.
Hammer guns are a type of breech-loading single-shot pistols produced within Oceanyka's underground workshops. They are typically made for large-bore cartridges such as .45-70 Government, though they do have a tendency to explode in the shooter's face, so they should be ditched for better options when available.