I have been drawing these things for years and I still can't keep most of hte details straight! You can tell it's a Multi Missile Launcher by the shape of the missile port. MMLs have a very distink key hole-ish shape.
Are you reffering to his Nick? Cause otherwise it would be White, like in blank... As from me, thanks for your work, really like the style of your mechs, BattleTech or other. Minor question on the side: do you draw also armor suits like Elementals of BT or the stuff they wear in Tribes: Ascend?