History of Factory Walker

The Factory Walker is a Minor-rank Fallen Walker of the House of Salvation and the opening phase of the final fight in Sabotaging Salvation, a Destiny 2: Beyond Light mission. It is armed with Arc Nose Repeaters, Missile Pods and a Solar Laser Cannon, and it can summon Fallen.

Encounter

The Walker is deployed after Guardians invade the Fallen factory and hack its console. It behaves like a normal Fallen Walker until it is immobilized, at which point a Factory Brig is deployed, crushes the Walker and begins the final boss phase. Another guide describes the trigger as reducing the Walker to about three-quarters health, after which a laser marks its position and an explosion replaces it with the Brig. The Factory Brig deals heavy damage and uses area attacks when you hide behind pillars, so keep moving. Destroying it powers down the factory and completes the mission.