UrbanMan’s reply: What you are describing is actually how you do a mechanical zero on the dot scope before you head to the range to shoot live and adjust the scope zero from there. There are a many people who have zero’ed a lot more dot scopes than me but I have done my share. After I mount the scope, and with a rifle/carbine that have already been zero’ed with iron sights, I would do as you suggest:
With a weapon on a stable surface, I will flip up the BUIS (Back up Iron Sights) and looking through the rear sight using the smaller peep sight, I wll use the windage and elevation screws on the scope to put the top half of the dot on the top of the front sight. Again, this is a mechanical zero. You will still need to shoot live ammunition and make adjustments, mostly likely fairly small adjustments on the scope.
UrbanMan’s reply: I am aware that EO Tech has different reticles available, however I became comfortable with the circle dot reticle. Once you get used to something and get older, comfort is important. I mainly use these three dot scope: the EO Tech with the circle dot reticle; the standard single dot Aimpoint; and, the circle dot reticle of the Leupold CQT scope.
However, I'd have to say I prefer the EO Tech’s scopes on a couple of my M-4’s. Both are Model 552 which are night vision compatible. I have the circle dot reticle with the 65 MOA circle and 1 MOA dot - see photo of this reticle at the top of this post. If I had to buy another EO Tech, I would look very closely at the AR223 reticle, however I’m happy with the Model 552 and standard reticle. If you do not have a need for night vision compatibility, then you can probably save a hundred bucks or more going to the Model 512.
When I first got a Model 552 I remember being told the battery life was 70 hours. But I asked around since I received your question and 100 hours and then some seems more the norm. The EO Tech have a cut off or automatic turn off feature so in case you inadvertently leave the dot on it will turn off in 8 hours, or you can change that to 4 hours.
No matter what scope or reticle you use, the most important factor is competency born by many sweaty hours on the range making it second nature to mount the rifle/carbine, acquire a sight picture and engage your target accurately.
But's it not just about accurate shooting. Clearing stoppages, changing magazines, shooting from disadantaged positions,...recognizing cover and using it correctly,....and a host of other skills. Good luck to you on your venture with dot scopes.
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