Which gas block on M27IAR
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Thread: Which gas block on M27IAR

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    Default Which gas block on M27IAR

    Iíve searched but canít 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 Iím 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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    From marine0303s excellent post it looks like a slimline GB. Assume it’s vented. Here’s post: https://www.hkpro.com/forum/teufelsh.../topics/197808

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    I think it's the same gas block/port size the MR556 uses... no bayonet lug (on the gas block) and all.

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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.
    Last edited by Montrala; 06-26-2019 at 09:47 AM. Reason: typo
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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.

    Which gas block on M27IAR-img_1170.jpg

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