[Viking]

I haven't tried the EO Tech yet? May be getting them soon. Not sure. I prefer the ACOG because of the magnification which comes in handy at my location. I have a back up iron sight that is zeroed. If I know that we are heading on a DA, I switch and put on my Aimpoint and move the red dot to the center of my iron sights. time permitting, I swing by the range and confirm. not always possible. It's always been dead on though. When I get done, I switch back to the ACOG and go zero. I put it back in the same slots, and it usually requires some very minor adjustments to get dead center.