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Connector causing double fires?

Discussion in 'Gunsmithing' started by BillR, Apr 14, 2010.

  1. BillR

    BillR Senior Member

    Mar 4, 2007
    Flagstaff, AZ
    My G22 has developed a case of double firing. (since I did a trigger polish!:embarassed:) I know...spare me the ridicule.:whistling:
    Anyway, when I swapped frames with my G35, the problem went away. Today I installed a new trigger group and firing pin on the G22, and still had the issue. I pressed the trigger to the rear and the striker fired. As I let the trigger up slowly toward the reset, it "fired" again instead of resetting the trigger. :faint:
    Just for grins, I swapped out the Ghost connector for a Glock 3.5# connector, and the issue is gone.
    How can a connector cause a double fire?:dunno: Glock gurus, please explain this to me...
  2. DannyR

    DannyR Moderator Millennium Member

    Dec 17, 1998
    Roanoke, Virginia
    You have an engagement problem between the lug on the firing pin and the trigger bar. Use an orange half cover plate to check for proper engagement. Cure is replacing the trigger bar, firing pin or both, depending on your "polish" job.

  3. BillR

    BillR Senior Member

    Mar 4, 2007
    Flagstaff, AZ
    That's what I thought also. I replaced BOTH, and still had the problem until I swapped out the connector.
    Doesn't make sense to me either...:dunno:
    Edit...I just tried the orange plate. The trigger bar/firing pin engagement is definitely stronger with the Glock connector installed.
    Last edited: Apr 14, 2010
  4. Glockrunner

    Glockrunner HOOYA DEEPSEA

    Sep 10, 2001
    Because of the right angle bend in the connector where the trigger bar comes in contact with it.
  5. JohnKSa


    Sep 8, 2000
    DFW Area, TX
    A connector can cause a double fire by forcing the trigger bar down during the reset process.

    That could happen if the edge of the trigger bar ramp or the edge of the connector ramp lip is rounded.

    Normally the two edges are square so the two parts can't snap back into engagement until they are in proper relation to each other. i.e. There is no up or down force applied to the trigger bar during this process.

    But if the edges are rounded that can create a camming effect that can allow the spring force of the connector to force the two parts back into engagement too soon in the reset process. That could force the trigger bar down enough that it comes out of engagement with the firing pin and fires the gun.

    In my opinion that would be unlikely to happen unless there wasn't much sear engagement to begin with.
  6. BillR

    BillR Senior Member

    Mar 4, 2007
    Flagstaff, AZ

    I think I understand now...
  7. JBaird22


    Nov 18, 2005
    If you want factory level performance, use factory level parts. Few people know this because they don't want to believe it but the best trigger job for a Glock is to apply an appropriate amount of oil between the connector and trigger bar and pull the trigger, a lot. Polishing where the connector meets the striker lug does nothing but decrease the amount of mating surface available to prevent lock up between the two parts. This condition creates the opportunity for full auto operation. Not desirable in a semi auto pistol.