Glock Trigger - Getting the Grit Out

Discussion in 'Gunsmithing' started by DirectDrive, Sep 26, 2018.

  1. DirectDrive

    DirectDrive

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    I don't see much posted on this.
    I have a G19 with this notchy, "eh-eh" thing just as I coming to the "wall" during the trigger press.
    There were two of them....you knew they were coming....annoying as hell.

    I went through everything trying to cure this, but with no success.
    Then I remember seeing a Johnny Glock video on the channel liner and the spring cups.
    I didn't do anything to the channel liner but instead focused on the spring cups.

    I took out my firing pin assembly and tested it in a spare channel liner.
    Noticeable drag. This was probably the source of my "eh-eh" thing.

    Tools:
    Dremel with small polishing wheel
    Polishing paste - I used Mother's
    Spare channel liner

    Process:
    1) Make sure that neither one the spring cup seams line up on the spring tag end
    2) Take the Dremel on low speed and start buffing the spring cups working around the cups with steady contact
    3) Check for fitment in your spare channel buffer occasionally

    It takes a while because this Dremel set up only removes a micron at a time.
    When the firing pin assembly enters the spare channel liner freely, you are done.
    This was an easy and excellent cure.
    So if you have the grittiness or whatever you want to call it, during your Glock trigger press, this could be the cause.

    Johnny's video for a visual :
    And a giant thank you to Johnny for answering my questions !

    View: https://www.youtube.com/watch?v=VT13FijldX8
     
  2. LostinTexas

    LostinTexas Exploring Alternate Routes

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    1 case ammo. Shoot it. A lot of things will smooth out. Not the least being, the loose nut pulling the trigger.
     

  3. mtstream

    mtstream

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    Johnny cracks me up, all that to end up just replacing the $2 part. :supergrin:

    Keith posted while I was typing but I was thinking the same thing and wondering how many rounds through the gun? Plastic parts should mate themselves up fairly quickly under live fire conditions. Unless they've been completely fubar by something like an aftermarket coating process but for a stock Glock I would expect them to clean themselves up relatively quick.

    I typically try to get at least 200 rounds through a new Glock the first range trip. I really don't worry about issues a Glock might have (rare but some will) until I get to 200rds. Almost all problems are gone by then.
     
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  4. mtstream

    mtstream

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    Duplicate post
     
    Last edited: Sep 27, 2018
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  5. LostinTexas

    LostinTexas Exploring Alternate Routes

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    I'm not convinced a thousand rounds are "needed", but the consensus is that by then anything that will work out by use will be worked out.
    Plastic parts on a pistol don't really meld. The metal will polish out, the trigger will smooth out, and the loose nut will tighten up and figure out what is making itself loose. Or just give up.
    I have never felt a gritty trigger on a Glock. I don't deny they are out there, and will admit I'm not anywhere as sensitive to such as many, but every single armorer I know (3 of them) along with every long time Glock enthusiast say the same thing, CHOOT IT.
     
  6. DirectDrive

    DirectDrive

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    So what part would you replace ?

    Somewhere around 600 rounds.
     
  7. DirectDrive

    DirectDrive

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    Maybe "gritty" isn't the right word.
    What I had might be described as "notchy".
    As you come into the "wall" just before the break, there were two of them.
    With a steady press, you could visually see these two little "motions".
    It would probably not be discernible in fast action shooting, but in slow fire you would have to account for both of them and then get up against the wall.

    When I took the firing pin assembly out and bench tested it with a new spare channel liner, it was clear that the spring cups were dragging inside the channel.
    Polishing down the spring cups was easy and I think it would have taken quite a few rounds for this to smooth out on its own.
     
  8. mmcbeat

    mmcbeat

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    Dry fire it - a lot. I’ve never used one but I think a reset is available so you don’t have to rack the slide each time.
     
  9. ChillyB

    ChillyB

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    Dry fire

    Inverted

    Half a hunnerd.
     
  10. mtstream

    mtstream

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    I wasn't referring to your gun but rather Johnny just cracking me up. He's put a lot of thought and effort into how to salvage a heat damaged piece of plastic and at the end of the video he tosses it for the $2 replacement part.

    That said, if you don't have extra spring cups . . . they're a pain to find if you drop one so it's always worth having extras around.
    Personally, even when slow firing, I pull quickly to the wall and start my slow fire from there. I don't find much value in beginning before that point as the wall of the connector is so distinct compared to anything prior that anything prior doesn't really matter once I get to that point.

    That doesn't change what you were dealing with. If I felt something in my trigger I'd want to solve it too.
     
  11. DirectDrive

    DirectDrive

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    One thing I can say for Johnny is that he can do a lot more with OEM parts than most of the other trigger tuners.
     
  12. Mr Meeseeks

    Mr Meeseeks

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    I completely agree that the varying tolerances of spring cups can cause drag. My solution has been to just swap out spring cups until I find a set that fits well.

    When you find some that are oversized it’s easy to tell. You can feel grit just pulling back on the FP lug with the slide off the pistol.

    If your pistol develops a terrible trigger after cerakoting, the channel liner was likely left in during the bake.
     
  13. vmann

    vmann Controller

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    This is more common than not on new glocks...I have started replacing my channel liners with the white one from lonewolf
     
  14. 'Ol Grandad

    'Ol Grandad Director of civil unrest

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    25 cent trigger job.
     
  15. Timothy Courtney

    Timothy Courtney

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    vmann, do you use the wolff marine spring cups too?
     
  16. OXMYX

    OXMYX

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    I could fire 5000 rounds to smooth out my Glock...….or spend about 20 hours performing secondary operations, something that Glock should be doing themselves.

    Option two is cheaper.

    Connector Geometry

    View: https://www.youtube.com/watch?v=4ScliCxoaYM
     
    Last edited: Nov 3, 2018
  17. mtstream

    mtstream

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    Option one also improves the shooter making option two also unnecessary.
     
  18. DirectDrive

    DirectDrive

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    Yep, the white aftermarket liners seem to have a larger bore than the black OEM liners.

    If your trigger has that stammering, lurching feel as you come up to the wall, then it's very likely the spring cup/channel liner interface.
    IME, after 3000 - 5000 rounds it should smooth out.
     
  19. DirectDrive

    DirectDrive

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    This is about the channel liner/spring cup interface.
    It's beyond the 25 cent trigger job.

    (I just heard a geezer's head explode)
     
  20. 'Ol Grandad

    'Ol Grandad Director of civil unrest

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    Not mine.
     
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