MP7 MOD gets raped anywhere that isn't Junk Flea or Death Room.
Kriss Specops is like a midranged MP7 MOD. Anyway, I'd still take the P90TR/SE over every SMG in the game.
I have the SpecOps, think Scorpion. The weapon's range is EXTREMELY limited. It has a very high RoF, combined with high spread and medium recoil, make this weapon useless outside CQB.