Quote Originally Posted by Boom
Who has the low down on gas ports for different length barrels? My main interest is 10.3 and 11.5 barrels but if you have a chart or list of other lengths that would be great. I have an old barrel I'm having cut down so it needs to be opened up so it will run.

TIA for the help.
14.5" and 16" barrels run .062" IIRC 10.3" and 11.5" are .085" and 12.5" is .074"