Det Timer, I use it more, more useful, no one plays underwater too much in CO
Water Impact (allows shots into water)
Detonation Timer (Fuse length on nades/mgl/etc)
when i play CO most of the maps i play have water in them...specially the long retrievals.
But i thing the det timer would be cooler. hmm hard choice. ill wait till the last moment to vote
EDIT: i just looked at the poll results. my vote wont even matter. lol.
I FAIL AT FAILING.