From Pathfinder Adventure Path: Gatewalkers, which isn't enabled.

Quarry Construct

CREATURE 2

LARGE CONSTRUCT EARTH MINDLESS

Perception +8; darkvision

Skills Athletics +9

Str +4, Dex -2, Con +5, Int -5, Wis +0, Cha -5

Items Warhammer

AC 18 ((14 when broken), construct armor); Fort +11, Ref +4, Will +4

HP 23

Construct Armor (Hardness 4)

Like normal objects, a quarry construct has Hardness. This Hardness reduces any damage it takes by an amount equal to the Hardness. Once a quarry construct is reduced to less than half its Hit Points, or immediately upon being damaged by a critical hit, its construct armor breaks and its Armor Class is reduced to 14.

Speed 20 feet

Melee Warhammer +10 (shove), Damage 1d8+4 bludgeoning

Pathfinder Adventure Path: GatewalkersORC