The Automatic Repulsor Guns are apart of Starfighter Command defense system.
Overview
Starfighter Command is equipped with Automatic Repulsor Guns as a part of it's defense network. Unfortunately, the Rylan Bursar, who was also a Xurian spy placed a bomb on one of the computers that were key to controling and operating them, and they were quickly taken offline allowing Xur's meteor guns to destroy the base.
