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Old 02-19-2010, 02:37 PM
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Default Scopes for MP-15 MOE

I'm considering adding a scope to my MP-15 MOE. The question I have concerns the front sight. Would it have to be removed?

I'm seriously looking at the NcStar 3-9 X 42 Ultimate system to purchase.

Are there any of you that have added a scope to your MP-15? Does the front sight obstruct the view through the scope of any that you have installed. For example the ACOG, or NcStar 4X32 or a 3-9X42 system?

Thanks for any input you can provide.



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Old 02-19-2010, 03:46 PM
DasFriek DasFriek is offline
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Can you link this "Ultimate system"?
This is my opinion, But if you use any optic thats magnified you need to remove the front sight or buy a fold down sight to replace it.
Its not that noticeable as the sight will appeared as an odd blur threw the scope, Only a fold down sight will stay out of the field of view of the scope enough that it can stay on.
Most ACOG's and 1x red dot sights on the correct sized mount will co-witness threw the sights and they can be left on or taken off. But too low of a mount can cause the red dot to be blocked by a tall stock iron sights.
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Old 02-19-2010, 04:46 PM
DasFriek DasFriek is offline
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Ive been doing some research about their "Ultimate Systems" which has a 1x non magnified red dot mounted above a magnified scope.
Here is one i suspect your talking about.
Ultimate ONE Sighting System - Long and Short Range - Mark III Rifle Scope with Red Dot

The scope is fine, But i know nothing about it. The issue is the red dot sight being mounted so high on a gun that has such a low bore axis that when sighted it that red dot will be off majorly when you go +10' further or +10' closer than the spot its sighted in at.
This is due to the sight being so far from the bore axis and they meet at a much sharper angle than the scope does since its closer to the bore.
If you want a red dot and a magnified scope both you need to find another place to mount the red dot.
Here is a pic of mine with similar specs of what your wanting.


You could also just put each optic on its own separate riser and take it off and swap pretty fast and it shouldn't be off being sighted in by much unless your a long distance junky.
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Old 02-19-2010, 04:57 PM
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I have a Leupold VX-1 3-9x40 on a Bushmaster XM15-E2s A3 flattop with rings that have the objective lens about 1/4 inch over the handguard. With the scope at 3 power, the front sight post is visible. With the scope set at 9 power the front sight post is not visible. For a long time I had the scope on a riser until I experimented and discovered that the riser was not needed.
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Old 02-19-2010, 05:12 PM
DasFriek DasFriek is offline
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Quote:
Originally Posted by glen_farmer View Post
I have a Leupold VX-1 3-9x40 on a Bushmaster XM15-E2s A3 flattop with rings that have the objective lens about 1/4 inch over the handguard. With the scope at 3 power, the front sight post is visible. With the scope set at 9 power the front sight post is not visible. For a long time I had the scope on a riser until I experimented and discovered that the riser was not needed.
Mine is close to 1/2" off the rail but i never checked mine at 9 power, I just never thought to do it as they were already taken off.
I can get 1/4" with just tall rings, But prefer low rings and a riser as i think it keeps things aligned better if i take it off.
Plus 1/4" is a bit to rough of my neck and eye relief.

The thing is if you leave them on you still cant use them unless you unmount the scope. But that would also apply to folding sights too so no need to upgrade to them unless you have a 1x un magnified red dot.
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Old 02-19-2010, 07:12 PM
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Quote:
Originally Posted by DasFriek View Post
Ive been doing some research about their "Ultimate Systems" which has a 1x non magnified red dot mounted above a magnified scope.
Here is one i suspect your talking about.
Ultimate ONE Sighting System - Long and Short Range - Mark III Rifle Scope with Red Dot

The scope is fine, But i know nothing about it. The issue is the red dot sight being mounted so high on a gun that has such a low bore axis that when sighted it that red dot will be off majorly when you go +10' further or +10' closer than the spot its sighted in at.
This is due to the sight being so far from the bore axis and they meet at a much sharper angle than the scope does since its closer to the bore.
If you want a red dot and a magnified scope both you need to find another place to mount the red dot.
Here is a pic of mine with similar specs of what your wanting.


You could also just put each optic on its own separate riser and take it off and swap pretty fast and it shouldn't be off being sighted in by much unless your a long distance junky.
Yes, that is the Ultimate System I was referring to. I understand the problem of being higher from the bore axis and the +/- 10' will change the strike point due to the converging angles.

I figured at close range using the red/green dot is more like shooting from the hip type of general area, if needed. If one were to measure the difference in height from the bore axis to the "parallel visual line" of the red dot, and sight them in as parallel lines, then one could in his mind aim at the target and lower/raise by that amount for a good strike point, knowing that the red dot is about 1.5 inches higher than the bore axis strike point. Therefore, with the red dot, always aim 1.5 inches vertically higher on the target.

It's a mental thing that the shooter would have to compenstate in his mind all the time. It's a detriment, yes, but possibly a compromise solution.

Just trying to think of all the options.

Last edited by cobrafast1; 02-19-2010 at 07:16 PM.
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