After many years and thousands of rounds of faithful service, the extractor claw on my stg556 finally gave out. I am not having any luck online finding a spare (or a whole bolt). Already emailed ratworx. Anyone has one they are willing to let go or can point me to a right direction. Much appreciated.

Call the rats, man. Check on GB as well.

Time for a real AUG.

Rat Worx were doing AR style bolts I believe on an annual basis, they needed so many before doing a run. If that's what they tell you let me know I'll put  a call in also.

Yeap give them a call. Emailed back and forth with Chris and he added me to the list, didn't say when the next run is

I'm on the list.

I had the same problem, my extractor broke, due to me using some defective Steyr USA made AUG mags that nosed the rounds down hitting below the feed ramp and jamming the bullet back into the casing. Ended up with a paperweight temporarily. My Msar Stg556 was a range toy not my go to gun by any means. Ratworx luckily got me a new extractor and got on the waiting list for the hybrid bolt using AR parts. It took about a year to get the hybrid bolt but it works great.  I cleaned and lubed it and manually cycled the charging handle back and forth about 100 times before going to the range. Run it wet when you get it and also in the adverse gas setting to break it in. I was using weak .223 ammo then m193 spec ammo. Recommend also getting their improved bolt sleeve to go with the hybrid bolt as well as not getting rid of the factory one. Keep as a spare.

I also recommend the bolt sleeve, there is some on Gunbroker now from Ratworx

Appreciate the advise. Also not my "go-to" gun, but has been a great range gun, can't wait to get it running again

I should hopefully be on the list too.  I have emailed them about once a year for the last 3 or 4 years waiting on the next round of Right handed Hybrid bolts.

This is of interest to me.
I have an MSAR E4 with an FN barrel that is still unfired because of the concern of parts availability.

Not to hijack, what parts should we be finding to support these rifles?

Steyr's kit consists of: "3 GAS PISTON RINGS 1 LOCK SPRING 1 GAS PISTON SPRING 1 LOCK SLEEVE 1 EXTRACTOR 1 EXTRACTOR PIN 1 EXTRACTOR SPRING 1 EJECTOR 1 EJECTOR SPRING 1 EJECTOR PIN 1 LOCKING PIECE 1 FIRING PIN WITH SPRING"