Factory German UMP rail sections
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Thread: Factory German UMP rail sections

  1. #1
    HKPRO PREMIUM PARTNER
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    Default Factory German UMP rail sections

    I purchased 3 of the UMP accessory rails from HKParts and I noticed there are two holes molded into the rail slots in addition to the mounting screw holes(see image).
    The holes are offset to one side. Does it matter if they are offset to the front or rear when installed?
    I'm not sure if it matters which way they face.


    Factory German UMP rail sections-20190803_133107.jpg

  2. #2
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    Wanted to know as well

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