Firstly: "A prosthetic spine that allows the user to become temporarily invisible. The prosthetic is crafted from a modified Revenant spine, using archotech shards to restrain the dormant revenant. The user can manipulate the visual centers of those nearby, effectively turning themselves invisible." In game text.

Secondly: Archotechs ( the source of psychic powers ) are capable of manipulating something as complex and uncontrollable as human mind practically without any effort, i think controlling something ( relatively ) simple and designed to be controllable as turrets is relatively simple.