Which can be a bit of a bother.
As people tend to do, someone (have a fairly good idea who) stole the blast effect from the NW2 Ult-Protos, as well as 1 of the standard nukes blasts, and incorporated them into this curious redeemer called the UKBadBoy. On the one hand, that's dirty pool... but on the other if I were to replace the NW2 Ult-Protos on maps with the UKBadBoy it would spare anyone who decided to use that map a lengthy download of a weapons package that a map only uses 1 weapon for.
This is the UKBadBoy:
Not the prettiest thing in the world.
Nothing is prettier than the firing effect of the NW2 Ultima Protos: