Colt le 6920: Front Sight Interference?


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Gun Geezer
August 6, 2012, 11:46 PM
I don't know jack about ARs.

I was gifted a very nice night scope that has integral picatinny base called an ELCAN Mount, so I need a rifle to put it on. Such problem we should all have!

Anyway, does the front sight tend to interfere with a rear mounted scope?

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allaroundhunter
August 6, 2012, 11:48 PM
If it is a magnified optic it actually will not interfere (IME) . It might appear that it will, but when you look through the scope you will see your target clear as day.

Sent from my HTC One X

TurtlePhish
August 6, 2012, 11:49 PM
Depends on the height of the mounted scope, but it usually ends up being "see-through". So in most cases, the front sight shouldn't get in the way.

Gun Geezer
August 7, 2012, 12:02 AM
I hear what you're saying.

The scope is only 2x power. Not alot of magnification.

if you have a 6920, how tall is the front sight?

allaroundhunter
August 7, 2012, 12:05 AM
What type of night vision scope are you getting? It will be easier for us to tell you if you will have problems if we know that than just speculating.

Sent from my HTC One X

TonyAngel
August 7, 2012, 12:06 AM
OK, I'm going from memory here, but I do believe that most mounting systems intended to go on an AR put the center of the optic about 1.5" above the rail (pretty much where the sights are with a fixed carry handle). Whether you will be able to see the front sight in the scope depends on how powerful the magnification of the scope is, or more specifically, the field of view in terms of degrees.

In simpler terms, the lower the magnification, the more probable it is that you'll be able to see the front sight. For example, with a red dot that has almost no magnification and a very wide field of view, you can definitely see the front sight. if I remember right, you can usually see the front sight with scopes up to about 4 power. Generally speaking.

Of course, this is just what I remember. I don't run any sort of irons any longer and don't have any to check out.

In any case, if the front sight gives you problems, you do have alternatives. The least destructive would be to replace your front sight based with a railed gas block or something of the sort; or, if you decide that the rifle will become a dedicated optics rifle, you can just take a dremel or hacksaw to the front sight base and take the top of it off. I'd go with option 1. If you cut the FSB, there's pretty much no going back.

Edit: more info came in while I was typing.

Gun Geezer
August 7, 2012, 12:13 AM
What type of night vision scope are you getting? It will be easier for us to tell you if you will have problems if we know that than just speculating.

Sent from my HTC One X
It's is a somewhat older scope by NAIT. Model is the Viper. They were sold thru Cabelas about 10 years ago

allaroundhunter
August 7, 2012, 01:03 AM
I googled images for the NAIT Viper and it looks like even with a 2x magnification you should have no problems with front sight interference on an AR.

basicblur
August 7, 2012, 01:35 AM
Can't help you on 2X, but I have an EOTech with the 4X multiplier - with the 4X you either can't see it, or you may be vaguely aware of 'something' there, but it does not interfere with my sight picture.

jmr40
August 7, 2012, 07:03 AM
At 1X or 2X the front sight will probably be visible, but out of focus. Generally on higher powers it is not visible. I don't see this as the issue that some do. I have a 1-4X scope on one of my AR's. Yes I can see the front sight when the scope is on the lower powers, but it is no more of a distraction than when shooting with irons. I just ignore it.

dprice3844444
August 7, 2012, 07:04 AM
there's always a hacksaw

dom1104
August 7, 2012, 09:09 AM
the front sight will dissapear at 3x.

at 2x you will see it.

henschman
August 7, 2012, 10:48 AM
On my 20" AR, I can see a small blur of the front sight through a 4x ACOG. It doesn't interfere when shooting though... it is very easy to just ignore. I imagine on a carbine-length rifle, with the front sight closer in, it is harder to see through a magnified optic.

jim243
August 7, 2012, 11:39 AM
You have two options:

1. Replace your gas block with a non-sighted one.

2. Get half inch risers and raise your scope.

Jim

kcshooter
August 7, 2012, 12:49 PM
it is very easy to just ignoreThis.

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