Fuzz with sustain that rivals Big Muff?

[Uncle Grandfather]

I understood that the search was for a fuzz that has more sustain than the big muff, not for a fuzz that sounds like a big muff with more sustain.
+1 on pigtronix philosopher's tone adding stupid incredible sustain to any fuzz.

[Gigahearts_FX]

Frazzdazler has way more sustain than any big muff I've tried

Or just add a compressor

[neonblack]

From what I remember, the depth charge had sustain for days. so maybe something in the Brassmaster family?

[misterstomach]

i used to use ocd>big muff(civil war) and it was fucking awesome. fixed a lot of the muff getting lost in the mix problems. definitely not muffled. you can get one for $90 and stack it in front of that muff. play around for five minutes to brighten up the sound and you'll be happy. plus it's just a cool and useful pedal to have on it's own if you want to do other stuff with it. stacks great with everything too.

[frigid midget]

Yeah, instead if replacing the muff or putting an eq or comp pedal in front of it...

Jus stack it with whatever distortion/pedal that fixes the muff's problem. You'll keep most of the typical big and hairy muff character, as well as the sustain, but you'll cut through a lot better thanks to the OCD you put in front of it. Tweak both pedals till you find the sweet spot, and call it a day. The OCD is a great suggestion, but I'm sure there's a ton of similar options out there that'll do fine too.

Don't give me shit for this, but imo anything that's supposed to sound like a muff, even the nicest most tweakable forume favorites, all compromise in the "cutting through" departement. The more muff-like it sounds, the less it cuts through a mix. Hence why I'd only use muff type pedals in combination with either amp dirt or my hotcake or something.

[K2000]

I understood that the search was for a fuzz that has more sustain than the big muff, not for a fuzz that sounds like a big muff with more sustain.
+1 on pigtronix philosopher's tone adding stupid incredible sustain to any fuzz.

Correct. The other answers are cool too though. Thanks you guys!

[BitchPudding]

BE Musket? I used to have it. Worked great for classic muff sounds, but also capable of sounding clearer.

I've also heard good things about the Skreddy Lunar Module Deluxe Mini. Look up a few demos!

Regarding the sustain of the EHX Muff, it's not rocket science:

...I loved the long sustain. This was done by cascading the circuit into additional sections, each one clipped by twin diodes.

- Mike Matthews

Seconded on the musket. it sustains something fearce, and Definately has more clarity than your standard big muff. Plus slam that fucker wih a Ssstampede after it and LAWD HAVE MERCY.