Not so legendary. Put the dot on the target and pull the trigger. Most red dots are 2 moa. That is a 4 inch dot at 200 yards. AR 15s shoot flat from 0-200 yards . No hold over or compensation needed. The bullet impacts where the dot is.
” Most red dots are 2 moa.”
A quick search shows red dots up to 6x.
“AR 15s shoot flat from 0-200 yards.”
You might want to consult a ballistic table.
L
That’s what I need.
I use what are called RIBZ sights on my AR. This stands for Revised, Improved Battle Zero. This technique allows one to set the sights for zero at 200 yards. The rifle will then also be zeroed at 50 yards. The fired round then will reach about two inches high at about 125 yards. At the muzzle, the round will be about two inches low.
Given my skill with open sights, that is pretty much "flat" all the way out to maybe 225 yards.