Fat Mike

Fat Mike prominently uses the Danelectro DC Cooper Bass, which first appeared on NOFX's 1997 album "So Long And Thanks For All The Shoes." This bass remains his primary instrument for both recording and live performances. A photo on Wikimedia shows Fat Mike with his Danelectro bass, further illustrating its significance in his setup.

During this video, when performing onstage, at 0:40 there is a pretty good shot of it. Fat Mike is using a modified Fender P-bass. He used this throughout his time with NoFX, he also used a danelectro later as well as several other bass guitar models.

In the Premier Guitar video, Fat Mike discusses using a Fender Precision (Antigua) bass while recording the song "Blocked Out" by RKL.

In a live performance at the Area 4 Festival, Fat Mike of NOFX can be seen playing a Danelectro DC 59 Bass Guitar. This vintage model, likely from the 1960s, features a single pickup, adding to its unique character.

Throughout this live performance, fat mike can be seen using a P-bass style G&L.

From 0:00-0:04, a young Fat Mike can be seen jamming on an early model headless bass (no tremolo system). This is the only time I have seen him use this. He mostly uses Fender P basses, and a few other random models as backup.

On the second page of this website, I got the clue to which headless bass model it could be. The Hamer Slammer series headless bass is the one he uses in this video. The cutaways are to make it look more like a Steinberger headless, a popular model at the time. The picture I had to upload to add a new item, is a similar headless bass, I could not find any pictures of a similar Hamer Slammer headless he is using.

http://www.fatwreckwiki.com/nofxwiki/viewtopic.php?f=1&t=2161&start=15

He used a rockson in the Turkey show. It copies the Music Man Stingray bass

In this video from the 1998 Vans Warped Tour, Fat Mike can be seen playing this 90's Fender American Deluxe Precision Bass. It features an all maple neck and a pearloid pickguard.

In this picture Fat Mike appears to be using a Danelectro Hodad bass guitar.