MEC-2 (Long War)
The MEC-2 offers more protection and versatility than their predecessor. It comes in two variants: MEC-2 Defender, eqipped with Body Shield, and MEC-3 Valiant, eqipped with Jetboot Module.
Essentially an upgrade of the base suit it provides more armor and defense, as well as one more secondary weapon slot. If you can afford, they are a must for your MEC troops.