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Sorry I can't help you with the delta ring but that part is used to snug the upper and lower receiver up and remove and play. It needs to go I'm before you put the grip on. You'll see a second threaded hole behind the grip screw hold and this goes in there and you tighten it until you eliminate the play! Oh and color fill looks good I'm debating doing mine!
Do you need the spring and clip also?
Good to know! Thanks! Def don't want to take the grip off to disassemble every time!I'm not sure about your receiver, but my Mega-Arms has one of those screws. I really like the idea of them, but I found that if I snug it up too much, it becomes difficult to remove the rear receiver pin without taking the grip off and loosening the screw.
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