pf2e.fyi
From Pathfinder #178: Punks in a Powder Keg, which isn't enabled.

Wooden Bullets Trap

COMPLEX HAZARD 3
Stealth +10 (trained)
Description A hopper full of wooden sling bullets is attached to several launching devices, which spew the bullets at high velocity through various holes in the boards covering the window. A distinctive "click" and whirring sound indicate the trap has been sprung.

Disable DC 17 Thievery (trained) to reinforce the porch pressure sensor or DC 15 Crafting (trained) to cover the holes launching the bullets

AC 10; Fort +15, Ref +5
Hardness 10, HP 50 (BT 25); Immunities critical hits, precision; Weaknesses fire 5

Auto-Sling
Trigger A creature or object weighing at least 50 pounds is placed on the porch (marked "T" on the map)

Effect A stream of wooden sling bullets flies from a launcher. The trap Strikes the two nearest creatures and then rolls initiative.
Melee Wooden Bullet +12 (nonlethal), Damage 1d6+6 bludgeoning
Routine (2 actions) The wooden bullets trap Strikes the two nearest creatures. It ignores Prone creatures as the bullets fly overhead.
Reset The trap stops after 10 rounds or when the weight on the porch is removed, whichever comes first. The trap can operate for a total of 10 rounds before its ammunition is exhausted.
Pathfinder #178: Punks in a Powder KegOGL