Adjustments
Adventuring Gear
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Assistive Items
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Contracts (4)
Cursed Items
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Customizations (5)
Intelligent Items
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Services (6)
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Shields (3)
Siege Weapons
Spellhearts
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Wands (3)
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Worn Items (5)

Concussive

Source Guns & Gears pg. 231
These weapons smash as much as puncture. When determining a creature's resistance or immunity to damage from this weapon, use the weaker of the target's resistance or immunity to piercing or to bludgeoning. For instance, if the creature were immune to piercing and had no resistance or immunity to bludgeoning damage, it would take full damage from a concussive weapon. Resistance or immunity to all physical damage, or all damage, applies as normal.

Weapons

Arquebus, Axe Musket, Black Powder Knuckle Dusters, Blunderbuss, Cane Pistol, Clan Pistol, Coat Pistol, Dagger Pistol, Double-barreled Musket, Double-Barreled Pistol, Dragon Mouth Pistol, Dueling Pistol, Dwarven Scattergun, Flintlock Musket, Flintlock Pistol, Gnome Amalgam Musket, Gun Sword, Hammer Gun, Jezail, Mace Multipistol, Mithral Tree, Pepperbox, Piercing Wind, Rapier Pistol, Slide Pistol, Sun Shot, Sun Sling, Three Peaked Tree