Every Footstep Wakes the Sleeping Weapon | Military Sci-Fi Infantry Story for Sleep

Inside Iron Vault Seven, a decommissioned cryogenic complex fused to a Stilt-Lord reef, Unit 781 serves on a four-man observation detail at the edge of a dormant colony. The official mission is to monitor seismic activity and colony vitals, but the Golem soldiers are really there as a disposable tripwire if the vault wakes.

The Stilt-Lords do not hunt by sight. They listen through calcified walls, breached bulkheads, contaminated life support, and the vault itself, where a footstep can become a signal and a rifle shot can wake the neighboring bodies.

This is "Tripwire Golem" by Sascha Schmidt