The Weapon/Anti-Ship Model 13 Grindell/Galileian Nonlinear Cannon is a UNSC weapon.
The THOR Laser is a massively upscaled, experimental version of the SPARTAN Laser. Very few working models exist, and those few are attached to a few experimental orbital weapons stations built from former Super MAC Station, with one other being attached to the Ragnarök-class DreadnaughtUNSC Our Own Wars in an attempt at ship-mounting the weapon. The weapon itself is greater in power than a Super MAC, being capable of blasting through several ships at once with a hit-scan ability, making it both incredibly accurate and incredibly dangerous. It could produce, at it's peak, 35,700,000 megawatts, though post VULCAN advancements jumped this up to 107,100,000 megawatts.