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When you would slowly close the bolt on Brenda the BEBoG carbine, it'd hang up just as the gas tube entered the gas key.
That's a symptom of a misaligned barrel nut.
This sort of thing can cause stoppages once the gun gets good an warm.
Luckily, I have the tools to properly align the barrel nut.
What I did not expect is for the barrel nut to be so overtorqued. They went almost a full tooth past where they needed to go with it.
It's fixed now, and doesn't appear to have lost zero comparing the co-witness of the red-dot with the irons.
I will have to hit the range to confirm that, of course.
I've heard complaints about PSA overtorqueing barrel nuts before. I guess this would tend to confirm that.
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