A Leviathan Siege Drill is a type of Dreadnought Close Combat Weapon designed for use by Leviathan Pattern Siege Dreadnoughts. They were developed to be even more destructive than most classes of Dreadnought siege drills, and can bore straight through the heavy armour of vehicles and fortifications with ease. They incorporate a Melta Gun built into their 'palm'.
- The Horus Heresy - Book Six: Retribution by Alan Bligh
- Leviathan Siege Drill - Forge World