Gyroscopic StabilizerEquipment 4
Source Pathfinder #179: Cradle of Quartz
Price 115 gp
Weight light
A gyroscopic stabilizer appears as a gold disk suspended within three rotating golden bands inside a gilded case, itself attached to a set of clamps. These clamps allow you to attach the gyroscopic stabilizer to any one-handed firearm as an Interact action.
Activate 
Interact
Frequency once per hour
Requirements The gyroscopic stabilizer is attached to a one-handed firearm without the fatal or fatal aim traits
Effect The gyroscopic stabilizer begins spinning for 1 minute. While the gyroscopic stabilizer is spinning, the weapon it's attached to gains the fatal aim weapon trait with a die one size larger than its damage die (maximum d12). This allows you to wield it in two hands to grant it the fatal trait.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
DivinationThe divination school of magic typically involves obtaining or transferring information, or predicting events.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.