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Thread: Extractor spring rubber plug on USP

  1. #1
    Unrepentant HKHolic
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    Default Extractor spring rubber plug on USP

    Do all extractor springs on the USP have this rubber plug:



    I took the extractors from (2) of my USPs and my SD model had it, but the standard USP 9 didn't. I'm not the original owner of the USP 9 so I wasn't sure if it was removed by the previous owner or if only certain models have them?

  2. #2
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    Only certain ones have it
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  3. #3
    a66
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    What's it for?

  4. #4
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    Quote Originally Posted by a66 View Post
    What's it for?
    It goes inside the extractor spring. I guess it just keeps the spring from compressing too much. Not completely sure though?

  5. #5
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    I remember hearing that its for compression and to keep it clean. The area where the extractor is gets dirty really easily and because not many people take the extractor out for cleaning, carbon deposits build up very quickly.
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  6. #6
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    Quote Originally Posted by skullbox View Post
    It goes inside the extractor spring. I guess it just keeps the spring from compressing too much. Not completely sure though?
    This ^

    I believe it is a stop

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