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+--- Thread: Piston Decision (/showthread.php?tid=392)
Piston Decision - random - 04-30-2011
I am looking at the AA 18in piston upper vs. the Precision Firearms 20in piston upper. The Precision tube is Sabre Defense. Does anyone know what barrel is used in the AA? Does anyone have experience with either or both of these piston uppers? Taking the cost out of the decision, which is a better barrel?