Glock recoil spring compression weights

Discussion in 'Gunsmithing' started by log man, Feb 24, 2017.

  1. log man

    log man

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    I am searching for the full recoil spring compression length in Glock large and small frame pistols, or the 17, or 19. In other words what is the space for the recoil spring when the slide is as far back and stopping during recoil?

    LOG
     
  2. mtstream

    mtstream

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    I've never seen that info so here's the methodology I used to try and get somewhat close using a Gen2 G17.

    Measured the RSA outside ends = 3.23"
    Measured from the front of the RSA back to the face of the slide when pulled all the way to the rear = ~1.94"
    Subtract 3.23" - ~1.94" = ~1.29" remaining
    The end of the RSA is ~.06 and the front is ~.08 if you remove that then the spring should be around 1.15" minus the depth of the guide hole when the slide is fully to the rear.

    PROBLEM - measuring from the front of the RSA to the slide face while holding the slide all the way to the rear was rather difficult, so no guarantee on the exactness of the measurement. And I don't have a tool to measure the inside depth of the guide hole. No idea why you would want this info but note that while I think I'm in the ballpark, there's plenty of room for error in my efforts.
     

  3. log man

    log man

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    Thanks for the effort and reply. Knowing these dimensions allows one to measure the weight of various springs. If one has a coil or two cut it will then show what the weight will be when compressed to the set compression space.

    LOG
     
  4. sciolist

    sciolist On the Border

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    Not completely sure I understand your question, but what I've done in the past is to use a shop clamp to hold the slide all the way back, then make aligned witness marks on the slide and frame. Then you can put the gun back in battery and compare the marks' positions.

    It's also useful to have a spring gauge to tell you how much compression gives an actual figure to match a particular spring's nominal figure.
     
  5. log man

    log man

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    I have the recoil spring gauge to check weight, but would like to know the compression length at full recoil of the Glock 17 & 19. I do not own any Glocks.

    For instance the 5" 1911 will compress the recoil spring to 1.625" at full recoil when the slide stops against the guide rod head. At this compression a 1911-16# recoil spring will read 16# within reason.

    LOG