Optics, Mounts, and BUIS?

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Originally Posted by wahoo95

The DD mount is solid, however after a couple of hard outings in cold/rain I wouldn't run anything that wasn't QD.

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I absolutely agree.

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Originally Posted by Doc Glockster

I like the T1 as well. I found that I prefer a folding rear BUIS because a fixed one causes too much visual clutter. YMMV.

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Completely agree. I tried using a LaRue fixed rear BUIS, but found lining up the dot with the irons to be slower than shooting without the BUIS in the way. Now I just use the Troy's.

I had not thought about not being bale to procure a sight picture with irons through the optic due to external factors such as rain, fog, or even possibly cracked lenses... I may need to rethink the non-QD RDS mount and go back with the Larue I was looking at. Thanks again for the input... something to ponder... good info and advice.

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Originally Posted by JW1069

Completely agree. I tried using a LaRue fixed rear BUIS, but found lining up the dot with the irons to be slower than shooting without the BUIS in the way. Now I just use the Troy's.

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Simple question? Do you actually try to line the dot up with your irons when shooting? If so, your going at this all wrong.

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Originally Posted by bsmith_shoot

Simple question? Do you actually try to line the dot up with your irons when shooting? If so, your going at this all wrong.

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I have heard this before...and for whatever reason if it's a fixed rear sight with a 100% co-witness to the optic then the tendency is to want everything to line up. I was never able to "ignore" the rear BUIS in such a setup and that's why I went with a folding rear sight.

To this day I put the red dot on top of the front sight post when aiming and I don't think I could tolerate it any other way.

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Originally Posted by Doc Glockster

I have heard this before...and for whatever reason if it's a fixed rear sight with a 100% co-witness to the optic then the tendency is to want everything to line up. I was never able to "ignore" the rear BUIS in such a setup and that's why I went with a folding rear sight.

To this day I put the red dot on top of the front sight post when aiming and I don't think I could tolerate it any other way.

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You are losing a bit of caipability by doing that.
Having a floating dot is advantageous for a variety of hold-over applications.

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Originally Posted by Failure2Stop

You are losing a bit of caipability by doing that.
Having a floating dot is advantageous for a variety of hold-over applications.

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I have a question about this too. Being old school I'm not that familiar with red dots. Prior to mounting a T1 on my M4 I had dabbled with an Eotech on someone else's rifle and that's it.

Is the nature of a red dot sight that it should be zeroed even if the dot is not perfectly in the center of the lens? If that's the case then I guess I have a fundamental misunderstanding of how RDS's work.

I ask because it always baffled me how an Eotech would still be useful even with part of the window destroyed or obscured.

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Originally Posted by Doc Glockster

I like the T1 as well. I found that I prefer a folding rear BUIS because a fixed one causes too much visual clutter. YMMV.

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This would be my vote. Has worked for me.

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Originally Posted by Doc Glockster

I have a question about this too. Being old school I'm not that familiar with red dots. Prior to mounting a T1 on my M4 I had dabbled with an Eotech on someone else's rifle and that's it.

Is the nature of a red dot sight that it should be zeroed even if the dot is not perfectly in the center of the lens? If that's the case then I guess I have a fundamental misunderstanding of how RDS's work.

I ask because it always baffled me how an Eotech would still be useful even with part of the window destroyed or obscured.

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As long as the red dot is still working and visible the Eotech or Aimpoint can still be effective. As long as you use it properly by using both eyes and as long as one eye sees the dot and the other the intended target your brain will merge what both eyes see and you can put the dot on the target.

Because of parallax correction in both Aimpoint and Eotech RDS it does not matter where the red dot is in the scope, at the far edge or centered it will still allow you to get hits on the target.

Both Aimpoint and Eotech have a small amount of parallax error inside of 50 meters. Set up a target at 50 to 100 meters away. Set your rifle on a rest and look through your RDS while moving your head to change the location of the dot inside the scope. You will see that while the dot position changes inside the scope it does not move from the point of aim no matter where the dot is located in the scope.

If you try this at a shorter distance you will see a slight movement of the p.o.a. on the target but you will still be well within minute of man. This is what makes these optics so effective in CQB.

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Originally Posted by Barvan40

Both Aimpoint and Eotech have a small amount of parallax error inside of 50 meters. Set up a target at 50 to 100 meters away. Set you rifle on a rest and look through your RDS while moving your head to change the location of the dot inside the scope. You will see that while the dot position changes inside the scope it does not move from the point of aim no matter where the dot is located in the scope.

If you try this at a shorter distance you will see a slight movement of the p.o.a. on the target but you will still be well within minute of man. This is what makes these optics so effective in CQB.

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Wow.

That's eye-opening. (Pun intented). :sarcastic:

I think we've just identified where I need formal training.