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Install factory scope rail on Older Ruger MK II

Discussion in 'Maintenance & Gunsmithing' started by chuckc, Apr 17, 2014.

  1. chuckc

    chuckc SW Wash. State New Member

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    Does anyone know the drill/thread depth for the three holes that are needed to install the factory scope mounting rail on an older Ruger MK II (target) pistol?
    I am sure the hole further back (rear) is tapped clear through the receiver, but the forward two seem to be blind holes. Obviously don't want to go into the bbl. or chamber.
    Appreciate any advice.
    thanks
    CFC
     
  2. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    Chuck
    My Mk2 and Mk 3 receivers are identical (minus the scope base holes)
    The front two hole depths are 0.25" deep, the mount screw depth is 0.21"
    The rear hole is 0.16"
    The exposed part of the screw below the scope mount measures 0.11"
    The tap is 6-48"
    Gun manual is located here
    On page 40
    NOTE C— Scope mount bases and rings listed will fit all Mark II and 22/45
    pistols. Only the Mark II Competition model is drilled and tapped at the factory.
    All other models must be drilled and tapped by your local gunsmith. Drilling and
    tapping instructions are available on request.

    I attached the drilling and tapping instructions
    Regards
    Rick
     

    Attached Files:

    orygun likes this.
  3. chuckc

    chuckc SW Wash. State New Member

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    Rick,
    Thanks for the info. I really appreciate your response.
    Chuck