04-26-2013, 03:22 PM
I have gathered some information about gas port diameters that I thought I would share with this forum. These 3 examples are all 6.5 AR barrels. I am sure these examples are not written in stone but I have personally used #1 and #3 with success. I am using factory Hornady A-Max and SST 123gr ammo and H3 buffer.
#1) 20" Barrel Rifle Length Gas Systen. (.093)
#2) 16" Barrel Mid Length Gas System. (.078)
#3) 16" Barrel Carbine Gas System. (.062)
#1) 20" Barrel Rifle Length Gas Systen. (.093)
#2) 16" Barrel Mid Length Gas System. (.078)
#3) 16" Barrel Carbine Gas System. (.062)