It ain't easy, that's for sure. The track clips along at 230+ bpm (i.e. pretty damn fast), so those palm mute triplets demand some high precision picking. Only one way to achieve it, that I know of: hours and hours of practice.
But this is not an uncommon demand in metal. So of course I had to take a shot at it just to prove it can be done with no trickery. And with trickery it could obviously be made more precise, to get that robot feel they were going for.
https://www.box.com/s/96cm1uj0de1zrld714yo
That's a cool riff, more intricate than it sounds - indeed more intricate than I played it, but I'm running out of time. Ok now I'm gonna listen to the whole track, sounds kinda cool.