Ion Shields are a type of defensive force field used by Imperial Knights. This ancient technology works by projecting an energy field across a narrow arc to the front of the Knight. By quickly moving the position of the shield so that it intercepts enemy attacks, a Knight is able to survive even the heaviest fire, whilst still being able to fire its own weapons in return. The exact setting and positioning of the shield is essential, as the ion shield is only designed to deflect and slow shots, rather than absorb them in the manner of the void shields used on Imperial Titans. This means the effectiveness of the shield is partially dependent on the skill and experience of its operator.