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Posted: 4/22/2019 8:19:06 PM EDT
I have an AUG with a 20 inch barrel. I have always thought that the outside of the barrel was just tightly "finned" like a Thompson barrel....but I have heard the external finish referred to as threaded.

Is the outside of an AUG barrel threaded or finned?

If threaded.....does anyone know what the pitch is?
Link Posted: 4/22/2019 8:38:49 PM EDT
the external threading is for a bayonet lug, not sure of the size and pitch
Link Posted: 4/22/2019 10:05:58 PM EDT
@maleante
Link Posted: 4/22/2019 10:15:45 PM EDT
M18x1.5 RH
Link Posted: 4/22/2019 10:31:17 PM EDT
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Originally Posted By maleante:
M18x1.5 RH
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Thank you, good Sir!!!!

You don't know the class call out do you? ( 6g, 6h, etc.) It is probably a 6g because the outside is oxide not a coating or plating....but it could be an odd call out.....

I will guess 6g.
Link Posted: 4/22/2019 11:33:21 PM EDT
I don't know that information. Your guess is as good as any.
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