"High Velocity Impact Cannons", the HVI is described as "a rapid fire MAC cannon, firing explosive shells" The cannons themselves are highly destructive, and one of a kind, as the only ones known whether made for the ship The cannons themselves, are just like the description; Beefed up MAC cannons An auto eject shell system was added, as well as a belt feed mechanism Explosive tipped shells are used, adding to the destructive power of the weapons