I know we've talked about this before; but here is the link again to a TA11/offset T1 setup on an AR15:
http://thefiringline.com/forums/showthread.php?t=385824
henschman said:
I tend to think this is a little redundant with an ACOG, since the ACOG is designed to simulate a non-magnified red dot when used with both eyes open. It's what they call the "bindon aiming concept," and is aka "occluded eye aiming."
What you describe are two slightly different methods of shooting that both rely on how our brains process binocular vision. The Bindon Aiming Concept provides a high contrast reticle in a magnified scope. The idea is you shoot with both eyes open and your weak eye sees the unmagnified image clearly while your dominant eye sees a blurry magnified image and a bright dot. Trying to make sense of it, your brain superimposes the bright dot over the unmagnified view until you stop moving the scope and the image becomes clearer.
An Occluded Eye Gunsight uses the same concept, except instead of a magnified scope. There is just a reticle - you can't actually see through it with your dominant eye. Sometimes people whose eyes can't do to BAC will use a flip cover on their ACOG and use the sight as an OEG with the cover closed.
This can be very fast, especially up close; but it is dependent on a number of eyesight issues. Also because the angle between the reticle and the eye seeing the target is changed, you'll get changes in point of impact. At close range, not a big issue if you maintain a good cheek weld; but get sloppy in your cheek weld or open the distance and you'll see the problem.
Standing still, you can use an ACOG by itself very fast. Where it gets tricky is if you need to shoot while moving or shoot frrom non-traditional positions; because you still have to be able to see the dot and have a good cheek weld to use either BAC or OEG. In both of those cases, the Aimpoint is usually faster.
I would think that method is as good as holding your rifle sideways "homeboy style" with no cheek weld and using offset sights.
Actually, that is one of the nice things about the Larue mount and offset sights. You don't roll the rifle sideways to shoot. You just cant it a tiny bit and the Aimpoint is right there in your field of view with your cheek still on the stock. See the pictures in the link above and you'll have a better idea of what I am talking about.
And unlike BAC, the offset T1 still has utility past 15yds or so.
marksman13 said:
By the time your brain processed that the target was close enough to use the Aimpoint and you adjust, you could have just taken the shot with the ACOG.
Most people who get a "surprise shot" that requires a quick reaction will just use whatever optic they are on, regardless of the distance. However, where it makes a difference is if I step from a 300m firing line into a shoot house, I can just cant the rifle and start working.
The problems I having with the offset T1 right now are:
1. Sighting in an offset mount is a bit of a pain because you get elevation and windage changes no matter which knob you use.
2. I've got my T1 bottomed out and am still 4-5" high at 50yds, which is where I would like it zeroed. I could get the 50yd zero; but I have to move the LT-724 mount back on the receiver, which means relearning a new cheek weld for the ACOG after 8+ years (i.e. not likely). On the other hand, I'm pretty much dead on at 15-20yds, where I would mostly use the T1 anyway.
3. My eyes are getting older and I miss the magnification. The T1 is also slightly darker.
4. After having the ACOG with its automatic brightness adjustment via fiber optic for so long, it is a bit of a pain to always be adjusting brightness. When the T1 is too bright, it loses its dot shape for me, which makes aiming at anything not right there in front of me problematic for my eyes.
5. Shooting suppressed gets you a faceful of gas out of the ejection port vents in the BCG with the rifle canted to use the T1.
