Not sure if this is a bug or not, not sure if it was intentional but the Hellfire Battlecruiser Heavy Turret Archs are rather good. All five turrets fire backwards. While the LABC, GRN / Council, Geb, Bullhead I believe only have 2 backwards and potentially a 3rd to some degree.
It also has 12 Primary Turrets, 5 Heavy Turrets. Not sure if this was intentional either.