MCR Bolt Knob Installation Pics

Discussion in 'Gunsmithing' started by Kevin Cram, Jan 23, 2011.

  1. Kevin Cram

    Kevin Cram <b>SPONSOR</b>

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    I was setting up to install a customer bolt knob today and thought I'd share some photos of the process. Hope you enjoy

    Prior to factory knob being turned down
    [​IMG]

    Factory knob turned down to .312"
    [​IMG]

    Handle single point threaded 5/16 - 24 tpi.
    [​IMG]

    KMW Grenade style knob installed
    [​IMG]

    Bolt all cleaned up and back in rifle
    [​IMG]
     
  2. geargrinder

    geargrinder Well-Known Member

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    Very nice. It's a bit too long for my taste, but the work is fantastic.
     

  3. trueblue

    trueblue Well-Known Member

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    Very nice, Kevin.
    I would like it better if it was tapered back into the original bolt handle.
    Would that be a hard process to do?
    Also, what does this cost as I have some interest.
     
  4. Kevin Cram

    Kevin Cram <b>SPONSOR</b>

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    I must agree, it is a pretty long knob. Trueblue, do you mean trying to blend the round knob into a rectangular handle? Here's another knob I made, it's also pretty long but I just make whatever the customer wants. This one blended in pretty well I think. Badger knobs blend in good too.

    [​IMG]
     
  5. trueblue

    trueblue Well-Known Member

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    Had not thought about how difficult blending a round knob to a square bolt, but that looks good.
     
  6. toasted

    toasted Member

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    you ever given any thought to offering that jig for sale? Looks like a winner to me! Maybe through Brownell's.
     
  7. RoyB

    RoyB Well-Known Member

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    I believe that jig is available through Pacific Tool
     
  8. toasted

    toasted Member

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    Thanks for the tip.... just checked their site and found it.
     
  9. Kevin Cram

    Kevin Cram <b>SPONSOR</b>

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    I've had this fixture that I built for about 5 years. I must admit it's not 100% my idea. I seen the original one Nate Lambeth built and built my own just by looking at his. It took a little bit of design getting the angles correct. The one Pacific Tool has doesn't have any support under the handle. You'll need to center drill the knob and use a live center for support. I built mine with enough support and clamping surface I don't need a live center. .020" per pass at .006" per rev. it only takes about an hour to set up, turn, thread and install the new bolt knob.