SRAM Rival 1 - direct mount chainring offest

I am building my wife's dream bike. Seven Axiom Ti, SRAM Rival1 and S&S couplers. I have a drive train question:

What offset direct mount chainring should I be using on the Rival1 crankset? I am guessing 6mm but I'm not sure.

Thanks in advance for the advice.

P.S. We have about 48" of snow...