Electronic sights on an AR

Steel Horse Rider · Oct 18, 2015

I bought an Eotech XPS2 sight for my Bushmaster AR Carbine yesterday and went out to the range to sight it in. I was very impressed with the performance of it but have observed a wide range of mounting positions (pertaining to fore and aft on the rail) people put it. I mounted mine as far back as I could but see a lot of people mounting them mid bolt or even forward of the receiver like a scout scope. The Eotech website does not give much information as to any recommendation other than if you are mounting a night vision of magnification device behind it. Any advice from those of you with experience?

Jackal · Oct 18, 2015

My rule of thumb is: If I shoot both eyes open, I mount it forward. If I shoot one eye closed, I mount it rearward. A lot of folks mount it forward for both eye's open shooting because it doesnt take up as much of your field of view.

chicharrones · Oct 18, 2015

Put the EOTech in different locations and see what you think. If you have rail space in front of the receiver you have plenty of trial and error room.

Since I have a standard handguard, I put my long base EOTech right in front of the rear sight. It works just fine, both eyes open or not.

No4Mk1* · Oct 18, 2015

My Aimpoint is forward on the upper to make room for a 3x magnifier and rear BIUS in rear.

basicblur · Oct 18, 2015

...see a lot of people mounting them mid bolt or even forward of the receiver like a scout scope.

While there's no arguing with what works for you, I think conventional wisdom is / was(?) if you're going to mount it forward, don't leave the receiver.

The thinking is once you make the jump forward of the receiver, accuracy can be affected by flex / movement forward of the receiver.

Sounds good to me - I have all of mine (even with magnifiers) mounted on the receiver.

strambo · Oct 18, 2015

It doesn't matter, just keep it on the upper receiver not the rail. I run my Aimpoint micro to the rear just in front of my rear iron sight, but it has a much smaller objective lens.

benEzra · Oct 18, 2015

For a 1x optic, forward vs aft is basically a tradeoff between field of view through the optic vs. amount of the world that is obscured by the body of the optic. Further back, you see more through the window; further forward, you see more of the world around the optic. As others have mentioned, try it in different positions in a variety of shooting positions and see what works for you.

rcmodel · Oct 19, 2015

Foreward works better for me.

I can see through it, as well as around it better.

rc

9mmepiphany · Oct 19, 2015

I mounted my EOTech far enough forward to clear the folding rear sight

There is no advantage to mounting an EOTech further back as it doesn't affect your sight radius. The balance of the gun should be a larger concern. Mounting it at the rear of the upper rail compromises mounting back up sights

Double Naught Spy · Oct 19, 2015

If you want to use it for longer distance shooting, the further the dot is from your eye, the better. You get an improved sight radius that way. However as noted, most folks don't mount that far forward unless operating the sight with other accessories (at least occasionally) such as magnifiers or NV gear.

gotigers · Oct 19, 2015

I mount Eotechs the farthest from my eye on the receiver as they can go. Never beyond the receiver ( never on the forend)

Electronic sights on an AR

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