"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
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Ha. Weak