M1117 Razorback Heavy Siege Tank

Goanna ISV

"Don't think your bunkers will keep you safe. This thing penetrates four meters of reinforced concrete."

- Lieutenant Lucien Vall

The MM813 Goanna was a modified version of the Monitor, its main gun and layout rearranged to incorporate a 350mm Mortar.

It started life as a refitted version of the Monitor that had suffered damage to main gun. Its armament was originally thought to be a joke by HIGHCOM until it penetrated a bunker at 3000m. Like the Monitor, it has been lengthened, widened and heightened, with a meter added to the width and length and the vehicle is 50 centimeters higher. The main chassis has been formed into a boxy shape, however the major difference, in the production model, is the rearrangement of the driver and gunner. To make proper room for the cannon it has been placed off centre, closer to the right side. The drivers seat has been moved back and the secondary gunner seat added to the front on a depression, along the driver to maintain maximum views of his surroundings.

The vehicle has limitless potential against defensive positions, with thicker armour and the ability to penetrate deep bunkers made it a instant hit with units operating in high intesity urban conflicts.

The weapon fires 350mm rocket powered mortars. Four varieties exist, the 'Smasher' HE shell, famed for its use on infantry targets, the 'Crasher' shaped charge round, capable of penetrating four meters of concrete, the 'Crusher' round with a heavy tungsten head for penetrating targets, filled with microveins filled with HE and a hollow warehead full of it as well, capable of penetrating 2.5 meters of reicnforced concrete and killing the occupants and the 'Masher' which had the same tungsten warhead filled with microveins of explosives but a incendiary charge.

UNSC remarks
"During a counter offensive on Holy Watcher one of these things blew a hole throghu the exterior compound's walls, then the interior compound and when the Remnant sealed up thier bunker it gave us a 'key'. The Brutes still looked confused when we ran through the dust and rubble on the other side of the bunker."

"Some say the demo mortar on the AVE its brutal on infantry but we hit a convoy of Shadows with this thing. Three of them in close formation, choked full of infantry. We just estimated how many there were, we found shit all traces of them in the 2 meters deep crater"

"We had a building fulla Remants firing off heavy weapons at use, it woulda been funny to see the look on those Charlie Foxtrots faces. Fuel Rod Cannon rounds just bounced off our front plate, the few that exploded did jack shit. We gutted the whole front of the building in one shot in retaliation."