The tri-sectional barrel of the Torsion Cannon is amongst the holiest of Mars' weapon technologies. When energised, it sends out three synchronous graviton gaol-fields that hold sections of the target in place.
As the sections of the cannon's barrel turn counter to one another, the matter grasped in the gravitic fields is mercilessly twisted, subjected to an impossible torque that rips, buckles and ruins alien monstrosities and enemy war engines alike.
- Codex Adeptus Mechanicus - Cult Mechanicus (7th Edition) (Digital Edition), "Weapons of Enlightenment", pg. 234