This BattleMech here is called the Squire, a Light-Mass Production Mech for a Made to be the Good Guys mech to fight against the Ants like the GM VS Zakus of Gundam

Squire have Weapons in the Chest, a gun Arm and a Support weapon on the other. There gun arm can be switch out for a normal arm for utility role and Squire are general focus on Energy, AC, Missile, Support, Etc. weapon and gear set up with almost all of them have unique color patterns that make each one unique