Besides Standard Version are there a few specialist mecha types used Also showing how big they are too

https://www.furaffinity.net/view/32074072/ And the Mech being used is the M2-FA

Cannon, see using extreme heavy and powerful weapons normal used in bunkers or turret defenses, Cannon Types are out fitted with extra power and specialize spikes to help stabilize cannon shots though this does make them heavy and not as mobile

Grabbler, Specialize in close ranged fights and use of throwing mechas around even when there are melee weapons, Grabblers can be see used against buildings to warships and in fights giving them another tactic of CQC fighting, however to make the most of it Grabblers power and weapons are more suited for close range fights

ShieldMan, Also know as ArmMan is specialize multi limb mecha made to care in extra weapons, gear or even help keep accuracy with weapons. ShieldMan are commonly seen used by more skilled pilots as the ability to fire almost all you weapons at once in great to have, only problem is not just weight but the limbs can be destroyed easy compared to Mecha itself

Flight, Specialize in air or even space combat, Flight Type can reach speeds be on that of the normal ones and with extra thrust can be control really well, but do to the massive flight pack most Flight Types only used range weapons and caring extra weapons will be a challenge