Re: best ar10 grip upgrade?
fwiw,
I prefer the standard ERGO Grip and have them on the four ARs I own. From the full up Colts, to the OBR, to the Noveske. That said it is a personal thing... You did not ask, however, for me a Crane/SOPMOD Stock and an Ergo grip is just about perfect... I've given both MIADs and Tango Downs away. Along with the Tango Down Mk 46. Greatly prefer the Dieter CQD. Fwiw & imho.
Regards, Matt Garrett
757-581-6270