Gun Blueprint is a hardmode crafting item,
Crafting
| Crafting Station | ||
|---|---|---|
 Necromaniac Workbench | ||
| Ingredient(s) | Amount | |
 | Torn Papyrus | 1 |
| Result | ||
 | Gun Blueprint | 1 |
Used in
| Crafting Station | ||
|---|---|---|
| Necromaniac Workbench | ||
| Ingredient(s) | Amount | |
 | Gun Blueprint | 1 |
| Result | ||
 | Rupicide Cannon | 1 |