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Posted: 2/9/2007 5:39:02 PM EDT
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As a spin off from the "Why is the ACOG so great " thread, I wanted to ask what did they change in the ACOG to create the BAC feature, because some models clearly do not feature this. Some people were suggesting that BAC works on many different kind of scopes. I'm thinking it doesn't work in all ACOG, according to the maker, so what is it? |
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| Also BAC means your aiming point is never lined up with your POI. It is just close. This is because the aiming point is set up for the view through your dominant eye and the taget view with BAC is from your non dominant eye. You will always have this shift with BAC. Also it is hard to get the non dominant eye to take over if ythe scope is not occluded or the view blurred with motion. That is why a 1X magnification scope is better than BAC... it is both easier to use and more precise. BAC is at its best just getting a disant target into your scopes view so you do not have to "hunt" for it IMO. |
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So it just as well could have been named BMC "The Bindon Marketing Concept" or "We Need To Cut Our Loses To Eotech or Bindon, You're Sooo Fired Concept"? I'm going to try one out, it damn well better be a good CQ sight or I'm gonna be pissed. I'll hold off on the EE sale of the Eotech! |
A very important point that I only discovered recently... I was looking at close up objects through the ACOG with both eyes open, and then closed my weak side eye only to find that reticle was slightly off. I am right handed and my left eye is just slightly dominant over my right. Switched to my weak side thinking that it might line up correctly that way, and found it did the same thing. I think if you were going to go with ACOG as a primary optic, realizing the limitation and training to overcome it should be an important point to focus on while training... more so than if you were using an Aimpoint or Eotech... Dave |
Hokie
Funny thing Is I was using this concept long before I knew what it was called.... I gotta market my own concept one of these days... Oh wait.. I got it it The H.A.R.V concept H:hold A:aim R:rapid fire V: Victory use this concept to win all your fire fights.... 
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Also the ACOG has a limitation when being used in close in the dark. When in the dark at close quarters the tritium will give a great BAC effect against the dark background. Problem is when you hit your weapon light the tritium is overwhelmed with the light coming through the objective, yet does not give enough light to power the fiber optics. The result is you lose the illuminated reticle and thus the BAC effect in the dark with a weapon light everytime you fire it up. This is also cured by using a 1-4X battery powered optic instead of fiberoptics and tritium. |
DevL's right...however I'll toss in the option of occluding your ACOG and/or taking it off and using your BUIS for CQB stuff. My ACOG is occluded.
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Thanks for all the great input. I was really under the impression they had made a change to acogs so I could use it like my eotech, but with magnification. Freakin marketing bullshit.I wish they would run some TV adds saying if you love your husband, you'll let him spend two months pay on an optic! I can hear it now..."Because an ACOG is forever"  I guess I'll spend the night considering a 1-4x variable. |
I know for the TA33, you can use Butler Creek flip ups (Size 1 & 9). For the TA31 and TA11 I believe they make a flip up front cap to occlude the ACOG. I forget the manufacturer, but check MSTN's website. I believe he has them. "Progressive?" Starts with a "P" but the actual name eludes my short term memory. The option exists though - I know that. |
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Hadn't seen any flip ups for the ACOG yet...thanks for the info. "Occluded" refers to covering the objective lens of an optic (must have illuminated reticle). You then shoot with both eyes open. Your brain processes the veiews from both eyes, superimposing the reticle over the target. Early red dot sights worked this way (search for "Armson OEG") |
So, the point is to make it a little quicker for CQB use? |
yes |
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