B36A4 Doesn’t save 1 specific attachment

I Tried applying the stippled stubby and taking of the muzzle so I would make it with the attachment points, but every time I would join a game, it would reset back to the muzzle and without a grip, if I use another grip it  works but not with the stippled stubby, I haven’t tried equipping another grip without the muzzle because the beta will have ended before I can play again