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7/10/2012 9:53:26 AM EDT
So rear MBUS I have on my DPMS AP4 Carbine has no elevation adjustment. I get that. However, the problem is that I have maxed out the adjustment on my front sight to lower the POI, but it is still hitting too high (about 3 feet at 200 yards).  Is there anything I can do to mitigate this? Thanks in advance!
7/10/2012 10:02:03 AM EDT
[#1]
So you have adjusted your front sight above flush to the point it is about to fall out?  You are talking about a front sight base front sight, correct?
7/10/2012 10:05:39 AM EDT
[#2]
Let me rephrase that.  The base of the front sight post, not the front sight.
7/10/2012 10:18:48 AM EDT
[#3]
Yes. Any more and it will come out of the front sight base.
7/10/2012 10:22:35 AM EDT
[#4]
I'm having the same issue with my polymer mbus.
7/10/2012 10:26:11 AM EDT
[#5]
Quoted:
Yes. Any more and it will come out of the front sight base.


Did your rifle come with a carry handle?  If so, have you tried zeroing with that?  Can you measure the height of the front sight tip?
7/10/2012 10:26:59 AM EDT
[#6]
Quoted:
I'm having the same issue with my polymer mbus.


What kind of rifle?
7/10/2012 10:28:46 AM EDT
[#7]
Quoted:
So rear MBUS I have on my DPMS AP4 Carbine has no elevation adjustment. I get that. However, the problem is that I have maxed out the adjustment on my front sight to lower the POI, but it is still hitting too high (about 3 feet at 200 yards).  Is there anything I can do to mitigate this? Thanks in advance!


What is the mbus attached to? Rail, gas block?  And what type of rail/gasblock?

Quoted:
I'm having the same issue with my polymer mbus.


Same questions as above.
7/10/2012 10:34:55 AM EDT
[#8]
Quoted:
Quoted:
So rear MBUS I have on my DPMS AP4 Carbine has no elevation adjustment. I get that. However, the problem is that I have maxed out the adjustment on my front sight to lower the POI, but it is still hitting too high (about 3 feet at 200 yards).  Is there anything I can do to mitigate this? Thanks in advance!


What is the mbus attached to? Rail, gas block?  And what type of rail/gasblock?

Quoted:
I'm having the same issue with my polymer mbus.


Same questions as above.


FSB.  You can't attach a rear sight to the gas block.  Well, I guess you could but...
7/10/2012 10:44:37 AM EDT
[#9]
Quoted:
Quoted:
Quoted:
So rear MBUS I have on my DPMS AP4 Carbine has no elevation adjustment. I get that. However, the problem is that I have maxed out the adjustment on my front sight to lower the POI, but it is still hitting too high (about 3 feet at 200 yards).  Is there anything I can do to mitigate this? Thanks in advance!


What is the mbus attached to? Rail, gas block?  And what type of rail/gasblock?

Quoted:
I'm having the same issue with my polymer mbus.


Same questions as above.


FSB.  You can't attach a rear sight to the gas block.  Well, I guess you could but...



Ahh, I got ya.  I thought we were talking about a front mbus
7/10/2012 11:11:14 AM EDT
[#10]
Quoted:
Quoted:
I'm having the same issue with my polymer mbus.


What kind of rifle?


Ruger 10/22 with archangel 5.56 kit. Attached to flat top upper & forward hand guard. No gas block on this little guy. Zeroed okay with a scope but was a bit overkill for this setup.
7/10/2012 11:12:40 AM EDT
[#11]
The MBUS is attached directly to the upper receiver's rail. The rifle shot fine with the carrying handle and standard sights attached.
7/10/2012 12:04:51 PM EDT
[#12]
Quoted:
So rear MBUS I have on my DPMS AP4 Carbine has no elevation adjustment. I get that. However, the problem is that I have maxed out the adjustment on my front sight to lower the POI, but it is still hitting too high (about 3 feet at 200 yards).  Is there anything I can do to mitigate this? Thanks in advance!


Do you have an F marked front sight base? If not then that could be the problem. F marked front sight bases are taller. This topic talks about it a bit.

Check out this topic. You might be able to simply replace your front sight post with a taller one.

7/11/2012 6:07:37 AM EDT
[#13]
You might be able to simply replace your front sight post with a taller one.

You can. And that is your solution,. Go to Brownells & buy a taller post. Then screw that into your sight base & then zero.
7/23/2012 1:18:23 PM EDT
[#14]
I had the same problem with mine. I sent Magpul pics of my sights. They said they were fake. You might want to do a little research.
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