Very nice.
Best guitar tone I've heard thus far on newgrounds, full and gutsy. This song is a great representation of metalcore/modern thrash (I really hate to label it though). The vox are strong, and have a nice sinister sound. What I particularly like about the vocals is that I can understand them without them losing any of the aggression needed to pull a song like this off. All in all, A very cool song with the guitar and vox taking the limelight.
Only thing I would suggest is turning the bass (the instrument) up a bit in the mix, I think it would push the verse over the edge into a real chest beater. Good work, I quite enjoyed this.