1:6 scale M5-Phalanx from the Mass Effect video games serie.
Copyright of any Mass Effect related stuff belongs to Bioware.
I designed this one for my 1:6 action figures, as I am a big ME fan.
This is an accurate design based on official artwork and the in-game model.
I printed 1 or 2 of these on my personal 3D printer, which you can see here:
Although I've left WSF as a cheaper option, I'd suggest choosing FUD as some of the details won't come out as good as they could otherwise.