Built both on my own. This thread your speaking of is going to get kind of silly really quick, but I'll play ball.
The DI is a proven design in the ar. It works. The piston is "fairly new" to the ar? There are highly polarized veiws on each. Hence, the resulting silliness.
I'll paraphrase myself again. Both work for me. Pistons not the holy grail and it's not the anti-Christ. Its a rifle.


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