pf2e.fyi
From Pathfinder Lost Omens Shining Kingdoms, which isn't enabled.

Screaming Pinion

ITEM 13
Price 3000 gp
Usage held in 2 hands
Bulk 1
Category simple
Group firearm
Damage 1d6 piercing
Range 70 ft.
Reload 1

This +2 greater striking flintlock musket is an innovation of the Platinum Wing, and possession of one by a civilian is a high crime in Andoran. The gun's secret is the chip of a warshard used as the hammer in the striking mechanism.

Activate—Transcendent Shot (manipulate)
Requirements The screaming pinion is unloaded

Effect You call on the power of the warshard to load the screaming pinion with a bullet made of divine fury. The next attack from the gun deals spirit damage, rather than its typical type, and on a critical hit, the target is subject to the weapon's critical specialization effect. If the gun isn't fired before the end of your next turn, the bullet disappears, and the gun becomes unloaded.

Activate—Eagle's Cry (concentrate, manipulate, sonic)
Frequency once per day

Effect The musket unleashes a piercing sound wave in a 70-foot line. Each creature in the area takes 8d10 sonic damage with a DC 30 basic Fortitude save. A creature that critically fails its save is also Deafened. If the screaming pinion has a +3 potency rune, the DC increases to 35 (DC 35 basic Fortitude), and the damage increases to 10d10 sonic.
Pathfinder Lost Omens Shining KingdomsORC