When using the red dot, do you focus on the dot, same as you have used the front sight for years, allowing the target to blur, or do you focus on the target with the dot a little blurry? One or two others have mentioned this above, but not sure it has been discussed enough.appy with them so far, but they are mounted more toward the rear of the firearm.
I see all the high speed/low drag guys mounting optics directly over the E-port, or even further forward.
What is the reasoning behind this?
My understanding from several YouTube trainers (e.g. Active Self Protection Extra and Warrior Poet Society) on using RDS is that we need to shift from old school front-sight-focus to target focus. This applies for both long guns and hand guns. I am a recent convert, myself, having added RDS to my 10/22 and M&P 15 Sport only last summer. I am learning all this as I go along.
With the target-focus basis, moving the sight forward gives you improved field of view (pointed out in one of the first replies) on the target, and reduces the obstruction that the RDS body causes as you watch your target. Also, the trainers point out that with a properly sighted RDS, with target in focus and red dot on the target you have a properly aimed sight picture, no matter where the dot is in the glass field of the sight. Further, they advise that shifting from front-sight focus to target focus as you learn the RDS will take hundreds, if not thousands, of repetitions to unlearn the old habit and ingrain the new one. Thus, they recommend a LOT of sight picture dry fire to improve.
Good luck!
Craig