The turbolaser known as the Superheavy Composite Beam Turbolaser was rumored to draw its power from kyber crystals, and the Rebel Alliance believed it to be a type of superweapon. These turbolasers, equipped in pairs on each Onager-class Star Destroyer, enabled long-distance assaults against starships, although their effective range was less than that of Orbital Bombardment Particle Cannons.
- Star Wars: The Rebel Files (Initial mention) (Implied mention only)
- The official Fantasy Flight Games website, in the article "A New Age of Battle" (backup link) (Initially identified as the Superheavy Composite Beam Turbolaser)
- The Siege Breaker article on Fantasy Flight Games' official website (backup link)
- Star Wars: Armada — Onager-class Star Destroyer Expansion Pack (Card: Superheavy Composite Beam Turbolasers) (Later released in Upgrade Card Collection)