Really digging this band at the minute been listening to them a lot but they're a bit of a strange set up, seems like there's 2 brother's one who does all the guitars and one who drums. The one who drums isn't on every track though, they've 2 drummers; I guess live they'd need a second guitarist as well.
They also have about 4-5 singers who they play with this one is the only one who doesn't do any growling. All of the singers are great singers but some growl in sections.