Rivet
from Praxis "Sacrifist" 
as tabbed by Hulk Blood 

well, this is basically 5 minutes of the same riff, but the riff is awesome

e----------------------------- 
B----------------------------- 
G----------------------------- 
D-------5----------5-------5-- 
A-------3----------3-------3-- 
E--2222---2--2222---2222------ 

I think the next part goes like this, but it's kind of hard to tell with all the screaming 

e-------------------------------------------------- 
B--------------------------------------------------
G--------------------------------------------------
D--------------------------------------------------
A-------5t6-----------------------5t6--------------
E--2t3-------5t6---7t8-------2t3------5t6---8t9----