Graviton Onager
From Warhammer 40k - Lexicanum
The Graviton Onager was a type of Graviton siege engine used by the Iron Warriors during the Siege of Terra. They fired either either ouslite, tungsten, chemical, or incendiary ordnance or simply recycled masonry from the palace itself. The weapon impacted with huge kinetic force.[1]
Trivia
The Onager was a small Roman catapult-style weapon, as well as a type of Equid pack animal.
Sources
- 1: Saturnine (Novel) Part 1 Chapter 3