Unless running a higher end AR, I think a polish, JP spring kit and a set screw above grip screw to remove some creep doable.
Did it to my Stag, shoots under 1" at 100 with 2-7X redfield rev off bags w 55 gr V max.
Even did it to my iron sighted beater Frankenrifle.
200 and in stuff, works for me.
True varmint rig, yeah, needs something better.