The Firewing was one of the six "wings" of the Hexagrammaton in the Dark Angels Legion during the Great Crusade and Horus Heresy. Its purpose is currently not known, but like all Dark Angels wings save the Deathwing and Ravenwing it did not endure into the 41st Millennium.
- 1: Angels of Caliban (Novel), Chapter 20
- 2: The Horus Heresy Book Six - Retribution, pg.72
- 3: Warhammer Community - Secret Orders of the Dark Angels (last accessed 14 January 2018)