Mercs Miniatures have posted the concept art for the USCR Assault Trooper miniature.
From their website:
USCR will wield extremely powerful and bulky armor. They are an intimidating force on the battlefield, fully embracing their raw power as a major part of their tactics (Brian will fill you in more on this – if you ask him nicely). Their armor is so demanding of resources, that each suit requires a great deal of power. As a result of all this power use, the suit also generates a ton of heat, so it’s covered in cooling fans/jets and heat sinks to maintain a stable operating temperature. However, all this armor comes at a price, which is much more restricted movement.