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what makes this a MKIISD upper? the only difference with the MKII model is that there is a space added for the bolts at the barrel retainer. this idea was taken from the FGC9 SD
what can be found here: https://odysee.com/@c0ld_d8rk_h8nd:8/FGC-9SD-release-V2:1
but this will prevent the barrel from rotating. or give the bolts in your shaft collars more space in case those are longer then normal
UNW FGC9 FGC6 FGC68 how I broke my low rail... so you don't do the same
https://www.youtube.com/watch?v=aahuB15Uo90
https://odysee.com/@UntangleWORKS:a/UNW-FGC9-FGC6-FGC68-I-broke-my-low-rail:c
UNW FGC68 FGC6 FGC9 in defence of the low rail, it's not so bad as I thought but there is alway fix
https://www.youtube.com/watch?v=oxXX39Y0KFo
LBRY Tags: fgc9; fgc9 mkii; fgc9 mkiisd; 3d files; fgc9mkiisd
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[不区石译][J.Stark] FGC-9 MKII [中文翻译/Chinese]

