When applied, the weapon has a taped bottle of poison connected to a flowing tube on the side. When applied, the weapon has a taped and modified blowtorch on the side. In addition to improving weapon stats similar to weapon upgrades, blueprints can apply elemental effects and damage types:
Weapon blueprints do not require an Upgrade Slot and instead uses different crafting components. In general, blueprints are used to craft items and to upgrade weaponry.