330mm strike cannons were an improved version of the 250mm strike cannons available to the thor walkers of Raynor's Raiders during the Second Great War. Due to their larger size, they were able to deal damage in an area as opposed to a single target, and could deal a larger amount of damage to their smaller counterparts. They were mounted dorsally on thors. These cannons were also outfitted on Blackhammer thors and the Odin heavy siege-walker.