Gunsmithing 16" .308 AR with rifle length gas system

[flyfisherman246]

What distance are you guys running for rifle length gas systems on DPMS style .308 AR's. By that I mean where are you drilling the gas port. I am getting conflicting numbers from different places I saw online. Also does anybody have experience with a rifle length gas system on a 16" .308 and know what port size was used?

Thanks

 

[flyfisherman246]

Anyone