Zenith Clone parts question

[smacksy]

I got this zenith V2 clone in the mail today and can't figure out what the little white ring is for seen in the parts bag.
If anybody might know please help me out..thanks!

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[Kemosabe]

looks like an extra insulator

 

[smacksy]

looks like an extra insulator

It is..I had to take the center post out to find out. Lol...thanks!

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