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Thread: AR15 gas port size for a 10.5"?

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July 27th, 2010, 01:40 AM #1
FJR86

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Abington, Pennsylvania
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AR15 gas port size for a 10.5"?

How big should the gas port be made for a 10.5" to fire all ammunition reliably?

Is there a magic number?

I saw a Compass Lake barrel ported to .07. Spikes reports range between .073-.089 and ADCO says what ever size is desired.

Any reccomendations?

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