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AR-15 Take Down and Pivot Pin Sizes

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  • RK808
    Senior Member
    • Feb 2009
    • 1042

    AR-15 Take Down and Pivot Pin Sizes

    Are they most likely going to be the same for the upper and the lower? Thanks guys
  • #2
    Army
    Veteran Member
    • Oct 2005
    • 3915

    ?

    Front and back pins are the same diameter, different length. The front pin "head" is larger.

    Colt makes pins that are proprietary to their receivers. All others use Mil-spec.

    So, no. The pins are not interchangeable.
    "A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself...A murderer is less to fear. The traitor is the plague."......Cicero

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    • #3
      esskay
      Senior Member
      • Oct 2005
      • 2304

      Some, but not all, Colts have different take down/pivot pin sizes ("large hole Colts")

      Some Colts have different size pins for the trigger group too
      WTS: Ewbank AKM & NDS-4 AK receivers, Custom Chief AJ Ruger Mini-14

      WTS: Oakley SI Shoes

      WTS KAC rail panels

      WTS: MGI Hydra Modular AR Lower

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      • #4
        stitchnicklas
        Calguns Addict
        • Feb 2010
        • 7091

        extended pins work great also,extra nub to pull with in length for dis-assembly

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        • #5
          RK808
          Senior Member
          • Feb 2009
          • 1042

          ok cool thanks guys =]

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