What is the best range to zero GG&G rear A2 BUIS and Eotech with Accucam? I have an XM15 A3 M4 16". Standard front sight.

I will have a 3x9x42 for detailed 200m + shots.

Thanks,
David

I zeroed that exact combo at 50 yds.  It's about 2" low for me at 25 and about the same high at a hundred.  There is a graph floating around here somewhere that shows different zeros at different ranges.  50 yds covers most of your bases for minute-of-badguy out to about 200.  Hopefully someone will pop up to explain the particulars.  Meanwhile, search the ammo forum.  There are tons of threads about zeroing your rilfe.

Cool. Thanks. So you would zero 'both' BUIS & Eotech to 50y then?

Zeroed the GG&G @ 50... DOBA! Put the dot on the top if the front pin and have a PERFECT halo CW through rear peep. W/O BUIS, @ 50, I can cover my 3 shot groups w/a quarter!

Thanks guys
David