Ooh, I would really like to answer that but unfortunately that question falls under the "No Comment" rule, sorry.
Remember he was upgraded from a standard unit. So much of the standard unit tech was reworked to give him his enhanced powers. So additional gravity orbs were put into his chest plates, just like design of a Gigantic, to boost both his gravity powers and the power of his smashers. This is also part of reason he is still green instead of standard WG Blue. His unit was upgraded, not replaced. Though I would argue that his meteor blast field is as much a weapon as it is a shield, but yes it is another example of CPM technology.
cheers for the info james, okay so if all wg are normaly blue then how come WG3 and WG5 aren't blue then
When I said the cpms were more denfensive in WGC its because although it can be used as a weapon he has to ram into his target instead of firing a blat like is normaly done with the cpms
WG3 is... uh super evil. And... evil corrupts... yeah... that's it...
As for WG5, well, evil too, but it was only a clone of the WG unit... ( still I think the yellow is kinda ugly IMO)