From Pathfinder Adventures: Troubles in Grayce, which isn't enabled.

Spear Launcher (Troubles in Grayce)

HAZARD 2

Stealth +10 (trained)

Description A wall socket loaded with a spear connects to a floor tile in one 5-foot square.

Disable DC 18 Thievery (trained) on the floor tile or wall socket

AC 18; Fort +11, Ref +3

Hardness 8, HP 32 (BT 16); Immunities critical hits, precision

Spear (attack)

Trigger Pressure is applied to the floor tile.

Effect The trap shoots a spear, making a Strike against the creature or object on the floor tile.

Melee Spear +14, Damage 2d6+6 piercing

Reset The launchers require manual reload.

Pathfinder Adventures: Troubles in GrayceORC