Where to mount optic?

[ruchik]

I've heard on numerous occasions that an optic should be mounted as far forward on the received of an AR as possible. I don't understand why? I can certainly understand in the case of using iron sights, as the longer the distance between two sights, the more precise you can be. But in the case of an optic such as a red dot sight, since there's only one sighting point, surely it shouldn't make a difference where it's mounted?

[Dead Man]

I've heard on numerous occasions that an optic should be mounted as far forward on the received of an AR as possible. I don't understand why? I can certainly understand in the case of using iron sights, as the longer the distance between two sights, the more precise you can be. But in the case of an optic such as a red dot sight, since there's only one sighting point, surely it shouldn't make a difference where it's mounted?

For sure reason: Opens up your field of view.
If I remember correctly reason: because it's more of a front sight than a rear sight... so the farther away from your eye, the less parallax. The closer to your eye, the more exaggerated the effect becomes.

[aguila327]

For sure reason: Opens up your field of view.
If I remember correctly reason: because it's more of a front sight than a rear sight... so the farther away from your eye, the less parallax. The closer to your eye, the more exaggerated the effect becomes.

Bingo

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[ruchik]

Makes sense. I was of the thought that having more window to view your target through would be better, hence having it mounted closer to your eye.

[CrazyFingers]

I was of the thought that having more window to view your target through would be better, hence having it mounted closer to your eye.

Except that since it's an unmagnified 1x optic, the dot is the only thing that matters.

[GH41]

You don't look through a window or at a dot!! You look at the target and the dot is there. The best way to train yourself is to close the front cover and shoot it. If you are looking at the dot you are backing up! I run mine as far forward on the receiver as possible without bridging the gap using a cantilevered mount. That is what works for me. GH

[Ryno12]

You don't look through a window or at a dot!! You look at the target and the dot is there. The best way to train yourself is to close the front cover and shoot it. If you are looking at the dot you are backing up! I run mine as far forward on the receiver as possible without bridging the gap using a cantilevered mount. That is what works for me. GH

Yep, same here. Focus on the target & the dot is "projected" on the same plane. Mine is forward on the upper receiver but not past. That's where I find it the most comfortable & the least obstructing of my view.

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