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Thread: Mil Spec Trigger Pins

  1. #11
    Join Date
    Feb 2007
    Location
    Pensacola, FL
    Posts
    1,596
    Feedback Score
    1 (100%)
    I have used many trigger/hammer pins from PSA and have yet to have an issue. Just saying. I am not sure who makes the ones they sell, but you can bet that several other companies sell the same ones.
    "A Bad Day At The Range Is Better Than A Great Day Working"

    USMC Force Recon 1978-1984
    US Air Force Res. 1995-2004 (Air Transportation)
    M16/AR15 shooter since 1978, gun collector and AR builder since 2004

  2. #12
    Join Date
    Sep 2019
    Location
    NV
    Posts
    33
    Feedback Score
    2 (100%)
    I prefer 3 groove pins especially if you are concerned about pins working their way out of the lower.

    FYI- the center groove is for the hammer, and the outer two grooves are for the trigger. The two hammer spring legs ride in both outer grooves of the trigger pin and I have NEVER seen pins walking out with a three groove pin (two groove pins only have one leg of the hammer spring leg retaining the trigger pin). I have seen a handful that had pins walking and they had two groove pins in a oversized lower hole.....can also occur if pins are undersized in diameter.

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