I‘ve saved the gas port sizes that have been posted on the forum previously. I have a Faxon Group Buy 16 inch mid length gas barrel and I like the way it is gassed with a carbine buffer and spring.
6.5 Grendel gas port sizes
12” Faxon GB .068” CLGS.
16” Carbine G. 0625”
16” Faxon GB .078” MLGS
18” Faxon GB .076” MLGS
20” Rifle LG .0935” same as 5.56/223
6.5 Grendel gas port sizes
12” Faxon GB .068” CLGS.
16” Carbine G. 0625”
16” Faxon GB .078” MLGS
18” Faxon GB .076” MLGS
20” Rifle LG .0935” same as 5.56/223