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Old 08-16-2012, 06:55   #1
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Optics question

I am getting close to making a decision on optics for my Colt 6920. I am not interested in removing my front sight so I am either going to mount my optics on the carry handle or remove the handle and use the rails. If I go with the rails would this Nikon M-233 mount allow me to bypass the front sight by the angled position? Is that why it's offset?


The scope I am leaning toward is the Nikon M-223 1-4x20.

I could mount on the handle but don't like the rise... Not sure I would like the angle on the flat top either though.
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Old 08-16-2012, 11:32   #2
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I am looking at that same mount for my flat top SR-556, although I am also considering an EOTech EXPS holographic too. Nikon makes another mount without the decline, .

It is not offset to the side, it has a slight decline for long range shooting, but that may interfere with your front sight if you remove the handle. Looking at other Colt 6920's in Google images I noticed that the vast majority of owners remove the handle to mount an optic. I found this image and it may be helpful to you.
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Old 08-16-2012, 14:50   #3
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Thanks BBP... very helpful. I am new at this AR stuff... that scope looks like it is line with the front sight. Is that what they refer to as co-witnessing? Am i right in understanding that at 3-9 zoom the sight is not visible but with no zoom you will see the sight? So my idea of a 1-4x20 will not work with the front sight hanging there. I also understand that i can remove that sight but it is not all that easy. New gas block and all. I am having a hard time with purchasing the Colt because it was one of the best out there and then dismantling it but i guess that is the culture in the AR world.

Back to the drawing board for me!!!
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Old 08-16-2012, 16:29   #4
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With any magnification 4x or above you will probably not notice the front sight at all, as the optic will focus past it. With a 1-4x you might see it, but it will appear as a "ghost" image and should not obstruct your view of the target. Many people use such scopes with the stock fsb in place and no problems.

Co-witnessing is when you use a non-magnified sight like a red dot, and line it up so the dot aligns with the sight picture though your rear and front iron sights, meaning you can use both or either if needed. It usually can't be done with a 1-4x since the 1 is not a true 1 power (zero magnification).
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Old 08-16-2012, 21:04   #5
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What do you plan to do with your AR? Are you going to train or compete with it? Are you looking to shoot long, short, or intermediate distances (or a little of everything)?

At the moment I am pondering my optic setup on my AR as well. In the end I would like to have the ability to do a little of everything, but don't want to have to buy a lot of different hardware. I already have a nice 3-9 Bushnell and would like to give it a try. That is why I am considering the Nikon M-233 mount. I am leaning heavily towards the EOTech EXPS-2 holographic sight, which can be used with the irons.

There in lies the problem because my AR doesn't come with iron sights (it arrives next week). I want the Troy folding battlesights, but they aren't cheap (around $160 for front and rear). The EOTech I want is around $500 and after plunking down a $1000 for the rifle I don't have the cash to buy them all right now. I am probably going to get the irons first and then go from there, although I would love to throw a quality optic on it day one.
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Old 08-16-2012, 21:12   #6
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I've found that a 1-4 is a good all around scope good for close up work and it'll still allow you to tag targets out to 500+ yards.

I'm using a Burris XTR with the BDC reticle so once you get the scope sighted in for 100 yards all you do to hit targets further out is gauge your distance and drop down to the proper line on the reticle.......no scope doping for distance is required.
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Old 08-18-2012, 05:29   #7
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I have the Burris PEPR Mount on my AR-10. I use the Leatherwood CMR. Its a 1x4 and works well for banging the gong at 200 yards.
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Old 08-28-2012, 10:55   #8
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I typically shoot at around 100 feet with my AR. I find the EOTech XPS2-0 is terrific for this. It provides an Absolute Co-Witness with the Troy Battlesights. I am hoping to get the EOTech fold-to-side 3x magnifier for when I shoot at greater distances.
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Old 09-05-2012, 12:53   #9
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I run two different optic setups on my ARs. On one I have a 3x9 Leupold mark AR with offset irons and on the other I have an EOTech with flip up cowitness iron sights. Jsut depends what kind of shooting you're looking to do. Also with the EOTech there is still the option of the flip-up magnifier if you did want to take it out a little bit farther.
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