question for the fellow glock guys

This is a discussion on question for the fellow glock guys within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; i noticed on my gen3 26 it has a pentagon and a AT stamped in the top of the chamber, I understand the pentagon stamp ...

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Thread: question for the fellow glock guys

  1. #1
    Member Array biggie1981's Avatar
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    question for the fellow glock guys

    i noticed on my gen3 26 it has a pentagon and a AT stamped in the top of the chamber, I understand the pentagon stamp but what does the AT mean?????? thanks in advance
    Glock 23 Gen3-- Mepro Light Tru Glo night sights-Polished Internals-3.5 lb connector-6 lb trigger return spring Extended slide release lever-Stainless steel guide rod-Pierce grip plug
    Glock 26 gen3--
    Pierce +2 mag extension w/ finger groove

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  3. #2
    Member Array Billspider's Avatar
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    I have the same markings on my chamber. Gen 4 Glock 26
    Utah Concealed Firearms Certified Instructor

  4. #3
    Ex Member Array barstoolguru's Avatar
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    this is what I found : The newest Glock barrels will have the markings on the top of the barrel hood instead of the side. The "AT" stands for Austria, Glock now makes some barrels in the US for export to countries that don't have trade agreements with Austria, those barrels have "US" on them. The "dotted pentagon" symbol seems to be a mark indicating the grade of the steel, the dotted pentagon barrels seem to be made of a harder steel than older barrels which have a pentagon with no dot.

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