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Glock 20 Light Primer Strike

Discussion in 'Gunsmithing' started by BigCheese03012, Dec 8, 2012.

  1. BigCheese03012

    BigCheese03012

    153
    0
    Dec 6, 2012
    Hello all, this is my first post on this site as a first time Glock owner. I recently purchased a G20 from '93 and when I trying to shoot it it would not shoot. Reason being light primer strikes. I called Glock and they told me it was probably the recoil spring so i ordered one. Upon examination of the pistol I noticed looking thru the magwell that the Trigger Bar Extension does not make contact with the Firing Pin Plunger when the trigger is pulled. My question is whether the trigger bar extension needs to press the firing pin safety plunger up in order for the firing pin to operate and hit the primer correctly. Any and all comments suggestions are greatly appreciated.
     
  2. lethal tupperwa

    lethal tupperwa

    8,664
    584
    Aug 20, 2002
    Virginia
    is it marking the primer?


    as old as it is there may be a build up of crud

    stopping the firing pin from fully contacting the primer.
     


  3. cciman

    cciman

    3,583
    117
    Jan 19, 2009
    SW Ohio
    Detail strip and clean out the the firing pin channel, and the clean the striker safety, extractor components.

    Check the contents of the striker pin channel while doing so: you might as well take out and check the sleeve when doing so to make sure it is not falling apart or broken (search the forums on how to do this-- i think I posted some tips for removing without damage), look at the tip of the striker.

    You might want to replace the striker spring with a Wolf Xtra power striker spring to improve reliability.

    Yes the trigger bar should be contacting (riding over) the safety plunger.
     
  4. Brian Lee

    Brian Lee Drop those nuts

    9,539
    427
    Jul 28, 2008
    Up a tree.
    This.

    I suspect you've gotten a Glock that was previously owned by one of those guys who thinks Glocks never need to be detail stripped or cleaned properly. They do. The safety plunger can also get so gummed up with crud that it may be stuck as well (in the upward position), which would make the gun very unsafe even if it was firing. Until it's cleaned right, you won't know what you've really got going on.
     
  5. cciman

    cciman

    3,583
    117
    Jan 19, 2009
    SW Ohio
    It is also unlikely the recoil spring. But the new one will be good, since you are not the OO.
     
  6. BigCheese03012

    BigCheese03012

    153
    0
    Dec 6, 2012
    I got the G20 shooting; here's how. I installed a new trigger assembly. It should be noted that on the cross of my new assembly there are the numbers 4256-1, And on the old assembly it is 4256. The part on the trigger bar extension that makes contact with the striker pin safety plunger on the old trigger bar shows obvious signs of wear although most of its shape seems intact, it was not contacting the striker pin safety as well as the new trigger assembly. I'm not sure if the old trigger was discontinued or recalled or not but I plan on looking into it.
     
  7. cciman

    cciman

    3,583
    117
    Jan 19, 2009
    SW Ohio
    That's not What I would have thought without handling the gun, but good diagnosis and treatment. Congrats.
     
  8. Glockrunner

    Glockrunner HOOYA DEEPSEA

    4,251
    3
    Sep 10, 2001
    SC
    Previous owner might have attempted the famous 25 cent trigger job....:rofl:
     
  9. blastfact

    blastfact

    1,657
    21
    Aug 15, 2011
    Oklahoma
    Glad to read your G20 is running!

    Now load up on quality ammo and fall in love. :)
     
  10. Austen S

    Austen S Austen

    11
    0
    Dec 9, 2012
    NW MT
    I'm having same problem and it sucks. With American quality 10mm 180gr and armscore 180gr I have had problems. About every 20rds I have one that will not go off. My trigger is noticibly "mushier" than my g23s so is it my striker spring that Is faulty? I have the 4256-2 trigger bar on a 20fs. And I have a 22lb rsa. I've cleaned the firing channel once and it still does it. Is my next option buying a new sriker spring or could I be missing something else
     
  11. Brian Lee

    Brian Lee Drop those nuts

    9,539
    427
    Jul 28, 2008
    Up a tree.
    Look at the end of your trigger bar & check to see if someone did a 25 cent trigger job and rounded off the end of it too much. That can cause the trigger bar to let go of the striker lug too soon.
     
  12. Austen S

    Austen S Austen

    11
    0
    Dec 9, 2012
    NW MT
    I bought it brand new last feb. Never had done anything to it except rsa. Looked at it and it looks normal to my other glock
     
  13. usnret

    usnret

    233
    54
    Jan 15, 2012
    Have an Amorer look at it. Just because you bought it new doesn't mean that everything internal is correct.
    And the last 2 Glock guns I bought had oil in the slide, like all over in places it shouldn't be.
     
    Last edited: Dec 20, 2014
  14. tom mac

    tom mac

    587
    61
    Jan 10, 2014
    NY
    When I got my new G20 a while back, the striker channel had some oil/crud in it and it was fresh from the box.

    I believe that's the one place they don't want you to lube!
     
  15. usnret

    usnret

    233
    54
    Jan 15, 2012
    The only things on the slide that are supposed to be lubed, and very lightly at that are the slide rails.