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Thread: Broken Trigger Pin

  1. #1
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    Broken Trigger Pin

    Attachment 15514

    I received a Giessele G2S today so I was swapping out a trigger from one build to the next. I was taking out a stock trigger from a Rainier Arms build and putting in an ACT as the G2S was taking its spot of the ACT in another build. As I pushed out the original stock trigger pin I noticed it fell right out. As I looked at it, I noticed it was only half the pin. The other half was still inside. After pushing that part out I took a pic. It appears the trigger pin snapped in half right at the center detent.

    Has anyone had this happen before?

    Weapon still functioned normal. I shot about 100 rnds last week and many more in January. I have no clue when / how this occurred.

    Looks like I need to pick up a trigger pin.
    Last edited by ZoneOne; 02-20-13 at 23:56.
    US Army Infantry 2008-2012
    LEO 2012 - Current

  2. #2
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    I've never seen that personally.

    Just curious, when you say

    Quote Originally Posted by ZoneOne View Post
    I was taking out a stock trigger from a Rainier Arms build...
    Does this mean you built the gun with parts from Rainier or they built the gun themselves? Maybe before this thread has a chance to head too far south, you should contact RA...
    Last edited by bleaman225; 02-21-13 at 00:16.

  3. #3
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    Broken Trigger Pin

    Since its such a small piece I'm not worried about it. Their CS is top notch and I will continue to do business with them.

    I've got extra pins so I don't need one.

    This thread was created in order to see if anyone has experienced something like this before. I've never seen it so I was curious.

    I debated about putting the name in here but I figured I'd have multiple posts asking who made it etc. This is not a complaint of their quality as I've owned this lower since 2011 and its been through its paces with out one issue. While I did contact them first, I am not worried about getting a reply. They have probably a thousand orders waiting to ship. My $2 pin isn't a big deal.

    I'm not sure if it was my fault. Essentially, by slowly pushing the pin out, the tension the trigger spring created may have caused it to snap or it could have been tension from me. Or it was just a faulty pin? This pin could have been broken for a long time, since I haven't removed the trigger since back in Sept / Oct.

    But - the weapon has been flawless so I'm definitely confused as to how it occurred.
    Last edited by ZoneOne; 02-21-13 at 08:50.
    US Army Infantry 2008-2012
    LEO 2012 - Current

  4. #4
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    There is nothing that you can do installing or removing the hammer/trigger pins that would cause that, unless you demonstrated catastrophically poor technique on removal. It was a bad pin.

    9mm guns are really hard on pins, but I've never had a 5.56 pin break.
    Last edited by eodinert; 02-21-13 at 09:44.

  5. #5
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    I've seen them break.

    Some AR's have a condition where on the backstroke, the disconnector runs out of free travel as it is being cammed back by the hammer. It moves the rest of the way by "picking up" the trigger and moving the trigger with it, against the tension of your finger. I've always figured these guns were candidates from broken pins. Oddly enough I haven't seen one that gave a trigger slapping sensation when firing-- seems like it would-- but you can feel it in hand cycling, the slight forward motion on the trigger.

    Seems like there are good pins and bad pins, too.

    At a class last weekend I had just finished telling the class that hammer and trigger pins are the same, interchangeable, can go in from either side and with the outboard groove on either side.....when a student brought up his hammer and trigger pins. They weren't interchangeable. One had an outboard groove and no central groove. One had a central groove and no outboard groove.

    Me no understand.

  6. #6
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    I've replaced at least three of those pins in friends and coworkers guns over the years.

    It's all a solid foundation of why I always keep spare parts on hand like that.
    Sig Sauer LE Armorer
    Glock LE Armorer
    Colt AR15/M16 Armorer
    T.O.S.S. (Tactical Officer Survival School) inst. Tom Long
    Vicker's Tactical Pistol 1 & 2 Carbine 1 Advanced carbine Inst. Larry Vickers
    Intermediate pistol Inst. Ken Hackathorn
    Combat Speed Inst. Dave Harrington
    Performance Pistol Inst. Frank Proctor

  7. #7
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    Is there any way you can get a clearer picture of the fracture surface?

  8. #8
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    I replaced one that broke in the same spot on a build done with a 380.00 complete parts kit that was bought at Knob Creek in the late 90s. Nothing in that kit was good- and I warned the owner never to grace my workbench with that "unknown" junk again.

  9. #9
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    This was as good as I could get it with my crappy camera and limited skills.

    US Army Infantry 2008-2012
    LEO 2012 - Current

  10. #10
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    Hard to tell with that picture but it was probably a flaw in the material. I'm not seeing any features that indicate any particular failure mode, fatigue or otherwise...
    Last edited by nova3930; 02-22-13 at 19:15.

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