Engineered for specialised siege operations and anti-fortification warfare, the Rapier Graviton Cannon Battery harnesses raw localised gravity to crush the foes of the Legiones Astartes. Built upon the rugged, semi-automated Rapier tracked chassis, these platforms leverage onboard power generators and advanced targeting systems to field heavy esoteric weaponry far too massive for even a Space Marine to carry into battle. When fitted with a graviton cannon, the Rapier fires high-density spatial distortion fields that rupture heavy armour, collapse structural chokepoints, and crush advancing troops beneath their own weight. Though less ubiquitous than the anti-infantry quad heavy bolter variants, Graviton Cannon Batteries are highly prized assets during sieges and breach operations, allowing Space Marine assault forces to shatter reinforced bunkers and pin down heavily armoured enemy units with terrifying gravitational force.