'Fraction' ATV

An Antigravity Tracked Vehicle ATV used by the HEX Mainframe.
 The Fraction - class is a medium ATV specializing in speed. It also uniquely sports a large spinally mounted railgun designed for use in atmosphere. This railgun is very powerful but difficult to utilize on ground due to its spinal mounted property.
The ATV is also armed with several laser weapons in turrets as well as chaingun CIWS and anti missile missiles. It is not well armoured however. It serves a fast role while making use of its railgun, not as an armoured tank. Due to this, the Fraction - class is usually kept in the rear lines to strike at enemy positions while heavily defended themselves.
It utilises highly powerful antimatter annihilation engines that propel the vehicle to high speeds. These are inspired by the Hyperion Federation and its antimatter annihilation core. The HM did not manage to do this as well as the HF did; its antimatter is for propulsion only and does not produce energy. It is also less efficient than HF photon drives as the resulting radiation is directed in a wide cone.
This was designed to be used for an artillery role, to bombard HF positions while still on orbit. Or, perhaps to fire at HF ships in orbit of a HM world. It is also entirely AI controlled so it has almost no reaction time and can instantly re-aim its gun when needed.
It uses a similar power generator that the HM uses normally. These are extremely efficient fusion engines that are capable of fusing a very large quantity of hydrogen for their size. These drink highly compressed hydrogne gas and turn it into oxygen via a large number of transmutations.