How to tell the difference between G17 Gen 3 and 4?

Discussion in 'General Glocking' started by BillG174, Jan 8, 2017.

  1. BillG174

    BillG174

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    I have a Glock 17 Gen 4 and it says Gen 4 on the left side of the slide. My friend just got a "good" deal on a used Glock 17 but he doesn't know anything about the gun. How can I tell what Generation it is? It does not say Gen 4 on the side of the slide. The recoil spring is smaller in diameter than my Gen 4 G17. My Gen 4 has the double recoil spring and my friend's G17 has a smaller single recoil spring. I can't tell if my friend's G17 has the Gen 4 mag release you can move to the right or left side or if his G17 will accept different back straps.
     
  2. PreciousChud

    PreciousChud

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    Does your friend own a cellular telephone device capable of taking photographs?



    P.S. He doesn't have a gen 4
     
    nikolaz and michael_b like this.

  3. Pepiot

    Pepiot Yippee ki-yay...

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  4. BillG174

    BillG174

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    Yes he has a cellphone. Should I have him photograph the side view of the gun and post the image?
     
  5. BillG174

    BillG174

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    Pepiot, thanks very much for the photograph. I can use it to compare the front of the grip where your fingers wrap around to tell what generation the gun is.
     
  6. GRR

    GRR

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    By your description, and if it has finger grooves, its a gen 3.
     
  7. arrtvandelay

    arrtvandelay

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  8. BillG174

    BillG174

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    What does RTF2 mean in the Gen 3 photograph above?
     
  9. Karambit777

    Karambit777

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    Rough texture frame.
     
  10. BillG174

    BillG174

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    Thanks Karambit777
     
  11. John Biltz

    John Biltz

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    If it doesn't say Gen 4 it is not a Gen 4. Not all parts are interchangeable so they label it. If it does not have a captured recoil spring it is not a Gen 4 unless its a G26 because all G26s have captured recoil springs. Texture on the grip is obvious if you see it.
     
  12. BillG174

    BillG174

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    John, what do mean by a "captured recoil spring"?
     
  13. PEC-Memphis

    PEC-Memphis Scottish Member

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    Doh ?
    If you remove the guide rod and recoil spring, and it "stays in one piece" it is "captured".

    If the spring doesn't stay on the guide rod, but is easily separable - it not captured (or it is a broken captured). There is a small cap on the end of the rod that retains the spring on single spring recoil spring assemblies (RSA's).
     
  14. BillG174

    BillG174

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    PEC - thanks for the info. I have learned a lot in this thread.

    Bill
     
  15. QNman

    QNman Old timer

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    :eyebrow:

    I'm going to have to check when I get home, but... which Glocks do NOT have a captured spring?
     
  16. DJ Niner

    DJ Niner Staff Member Moderator

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    Here's the newer version of my Glock Frame Generations image, the frame textures are a bit easier to see (although almost no one likes the background :supergrin:); click to enlarge slightly:

    [​IMG]
     
  17. BillG174

    BillG174

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    Thanks DJ for the frame pic!
     
  18. John Biltz

    John Biltz

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    Any Glock 9mm or 40 that is not Gen 4 or a Glock 26 or Glock 27. A G30 also has a captured spring but is in .45. That is the end of my personal experience but I'd guess the G29 as well. Could be any model number past 26, looks that way, but that is beyond my personal knowledge. Interesting question. Hopefully someone can fill in the blanks. Could well be any Glock model numbered below 26 Gen 1 to 3 does not have a captured RSA.
     
  19. QNman

    QNman Old timer

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    A "captured spring"? No, they all have that - the spring doesn't "come off" the guide rod, making it "captured". Even on Gen 2 and Gen 3.
     
  20. John Biltz

    John Biltz

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    My Gen 2 G17 spring comes off. I just did it. the only Gen 3 Glocks I have are G26s.