the default seraphim ACU weapon is a bit off compared to the other ACUs:
direct fire range: 2-22 (others 1-22)
OC range: 2-22 (others 0-22)
this results in the seraphim ACU occasionally not shooting at any units, when the focus target is too close
http://content.faforever.com/faf/unitsD ... 01,XSL0001