I was told it was a brassmaster! Ive got a b;assmaster (brassmaster clone) on the way so next week when it turns up sabotage will be the first thing i play on it.
I seem to remember reading in an interview that they used an old 70's Univox Super Fuzz on the bass. But there are a ton of copies out there
Mix did a piece on their new tour this month and if you look at bass rig shot there is a orange and blue Univox Super Fuzz on the floor right in front of it.