FGC-6 UNW22 backplate

SF bolt checked: 

E1 needed to be updated to make it work with the SF bolt, this can been seen by the SF mark, older versions with out this mark will not work with a SF bolt! 

E2 already was compatible with the SF bolt so it's the same file so no SF mark, jet it works
 

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this are redesigned back caps for the FGC-6 (MKI/MKII).

Note: the FGC-6 replica can use FGC-9 buffer tube/stock options, but FGC-6 stock options are not comparable with the FGC-9 platform

for all the other stock options look at this original set