Piston or DI for a Grendel Build?

[rkflorey]

I have played with Piston uppers in the past and really don't see the advantage for the additional money. I have only seen one DI gun that had issues with operation that could be traced to the gas system (broken gas key cap screw). If you just have to have one or like the easier cleaning then go for it. Otherwise spend the cash on an upgraded scope or trigger.
My 22" CSS Grendel is accurate and reliable. I would have no trouble trusting my life to it. Welcome and good luck with the build. Kevin