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Thread: Para LDA Hammer and Sear Location. HELP!

  1. #1
    Join Date
    9th May 2017
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    Para LDA Hammer and Sear Location. HELP!

    Im sure im not the first to ask you this question. (Please see attachments)


    I was wondering if you can help me out with to Sear Hole Location from the center of the Slide Stop Pivot Hole (YELLOW in attachment)
    To the LDA Sear Hole (PINK in attachment)?

    What is (DOWN)?
    What is (ACROSS)?

    I got a 80% frame (LDA Single Stack Officer 3.5 length barrel) from Sarco Inc. and i cant find that dimension anywhere.
    Not knowing much about the Lda at that time of purchase.
    I already have all the parts to complete this build but that hole location.

    I know i can convert to single action but i dont want to do that yet since i already have all the double action parts.


    If you "cant" help, can you please point me in the right direction?

    I am building a Universal Drill/Slide cut fixture with drill bushings for single and double action (LDA) so these numbers wont be a mistery anymore and i will share to whomever needs them.
    I know there's fixtures on the market already but not for the LDA Sear Hole Location.
    If I am missing any details please let me know.

    Please no smart remarks.
    We are adults here.
    I know im a noob, and you were once one too.


    Thank you very much.

    Andy O.
    Attached Images Attached Images

  2. #2
    Join Date
    18th June 2012
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    Have you tried contacting Para, now part of Remington, and asking for drawings? I don't know if they would give them out, but it's worth a try. Also, is something like this in the archives of the US Patent Office? A few years ago I did some searching for information on 1890-1900 kerosene lighting. I'm sure the search process has improved.

  3. #3
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    24th February 2008
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    Wabash IN
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    Tag for interest.

    Josh

  4. #4
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    I did call them, and no go. I was trying to figure out why but it dawned on me, (Parent's). Duuuh!
    A manufacturer is not dumb enough to share there drawings with Joe Shmo.

    I did get the locations. I have not test it yet but i will be soon.

  5. #5
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    2nd June 2004
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    Could you tell us how you obtained the measurements?
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside

  6. #6
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    9th May 2017
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    I obtained a frame and made a drawing from it. Just the hammer and sear locations in relation to the slide stop hole.

    It seems to function well but I have not put a live round in it yet.
    Last edited by andmancrex; 19th October 2017 at 18:45.


  7. #7
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    Printed a 1:1 print and all the holes line up with the existing holes in the frame.
    I also made a hammer and sear fixture to see exactly how it works in the frame since there's all kinds of SHoT going on inside.

  8. #8
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    29th May 2004
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    Just a link, which might be of help.

    https://www.m1911.org/technic32.htm
    John Caradimas SV1CEC
    The M1911 Pistols Organization
    http://www.m1911.org

  9. #9
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    I have read that many times. I have found anything and everything that has to do with the LDA.

    Everything looks a works great. No binding. No sticking. Time for the range!

  10. #10
    Join Date
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    Good work then!
    John Caradimas SV1CEC
    The M1911 Pistols Organization
    http://www.m1911.org

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