I just finished up Disco's JG Sig550.
It needed a spring guide, 7mm metal bushings (at least for this mechbox).
The rest of the parts were ok.
Greasing was horrible and it was almost solidified. I actually had to scrape some of it off.
Shimming was horrible...ignore at your own peril.
This rifle is just begging for a bigger battery.
Friggin long enough as is...
Have fun...make sure you watch the mag area cover plate as you pull it apart.
Tys
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