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Discussion Starter #1
I’ve searched but can’t find the answer. Someone on here MUST know. Also, what is the size of the gas port on the barrel? Do any use an AGB? I read where some rifles are being designated for DM with the old Leupold scope that was on the Mk12. I think I also read where these rifles will get suppressors, which is why I’m also wondering what GB and gas vent hole size are on these.
 

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I don't think they have the latest A5 adj GB nor the interim Norwegian one.

Perhaps it's the old school vented one. Or maybe they have both (vented and not-vented) as part of a multi year rollout and product enhancement schedule?
 

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Same gas block MR556 uses, but according to some I read about M27 adoption program gas vent hole was enlarged by 0.2mm.
 

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I believe it is identical to the MR556 and same gas port size, plus vented.

Here is a picture from an actual M27 16.5" barrel.

IMG_1170.jpg
 
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