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9/19/2017 7:27:10 PM
Posted: 2/9/2006 5:28:02 PM EDT
[Last Edit: 2/9/2006 5:51:05 PM EDT by jeepsrock]
I am looking to find out what the diameter of the gas port hole should be on a 16" carbine length AR15 barrel with a threaded muzzle.
Link Posted: 2/9/2006 5:39:17 PM EDT
A 16" barrel with .625" FSB should have a gas port somewhere between .063" and .078".

A 16" barrel with .750" FSB should have a gas port somewhere between .070" and .086".
Link Posted: 2/9/2006 6:27:32 PM EDT
Thanks for the info.
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