6 straight hours of work for this one, a nice break from all the commissioned stuff.
I assumed I had drawn one of these 4 armed type mecha before, as I reference them as the source of inspiration for Nayora's many armed elemental techniques, but apparently I have not.
The small and large arms do not mirror each others movements (like say, landmates), instead the pilots spend years training their minds to utilize 2 extra limbs. This is best achieved by implementing cybernetics during infancy while motor skills are still being developed. Needless to say these programs have been quite controversial, but have yielded some of the most elite mech pilots to serve in Ranger special operations units.
These unique pilots and their advanced mechs are considerable investments at the base line, so nothing is spared to ensure that nothing but the best tech is made available to these units, maximisung thier effectiveness and durability. Custom bio-synthetic neural mechs, high output shielding systems, assistant AIs, and any weaponry desired.
While Elementals are the masters of precision attack, these spec ops mech units can deliver the same in an urban environment through brute force and can afford to take some hits doing so.