M&P Sport2 AR-15 5.56 Barrel Diameter?

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M&P Sport2 AR-15 5.56 Barrel Diameter?

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05-09-2023, 05:53 PM

Thirsty Traveler Thirsty Traveler is offline

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M&P Sport2 AR-15 5.56 Barrel Diameter?

Hello,

I just recently purchased the M&P sport 2, A.R. 15 chambered in 556 with the front A2 fixed sight. I’m looking to replace it with just a Picatinny gas block. However, I’m having a hard time finding what the right size barrel diameter is. I know they change the barrel to a 1/9 twist, don’t know if this has any effect on the barrel diameters outside dimensions. Can anyone hear help?

TT

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