I'm pretty sure that's the helmet of a Helgast soldier from Killzone 3. The canister, the red eyed goggles, the flip up in the back... just missing the symbol... Think you can ask the person you did the trade with to confirm?
Quoting Garrett A.
Nice! I don't usually go for customizing minifigs, but this looks great! Oh, do you think you could do me a favor and tell me what you think of some of my MOCs? Any of them would be fine.