TRS-25 co witness problem

alberta5492

alberta5492

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Hello,

Not sure if anyone has had this issue, or would have some suggestions. I have a Norinco CQA with 14.5" barrel. I have installed a back up, flip up rear sight and a Bushnell TRS-25 micro red dot. It still has the factory front sight. All the reviews I have read say that the TRS-25 holds perfect co witness, but when I flip up the rear sight, it is anything but perfect. The sights barely line up near the bottom right of the field of view of the red dot scope. I tried to fix it by turning around the Bushnell riser mount it came with...same result. Then tried mounting the scope on the quad rail forend and using the factory carry handle sight...same result. Am I an idiot and doing something wrong, or has anyone had a similar issue?

Is it possible that the rifle is somehow out of alignment, or somehting like that? Hard to tell from eyeing it up.

Please don't respond if you are just gonna say "buy an Aimpoint and a high end AR"....doesn't help me, cause I'm not gonna.


Thanks.
 
the fixed front sight may be out of alignment.. ive had a few of these TRS-25 with the co-witness mount, and they all lined up with a perfect
lower 1/3 co-witness.
 
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alberta5492 said:
I was hoping to not have to get it to a gunsmith, but that is probably a likely cause. Without doing a search on the forum, is it something that happens with the questionable quality control on Norinco guns?
Click to expand...

Norinco AR's, in particular, are usually pretty good in terms of QC... but, I wouldnt put anything past norinco by means of sub par QC...
 
If it is an alignment issue, I wouldn't bother with a smith. The front sight is pinned on the barrel and would be very tricky to re align as the barrel has already been cut with the flawed alignment.

I would look at the lemon in such a way that if I was going to make lemonade, I would consider grinding the front sight off,or replacing it with a low pro gasblock, then getting a longer rail to go over it, and a flip up front sight.

That's jsut how I'd deal with it anyway.
 
Hmmm, well, it looks like your TRS is high, which means 1/3 co-witness. That's normal for a lot of optics, tho' I don't like it personally.

In 1/3rd it's common for the dot to sit way at the bottom of the viewing area, making it sometimes difficult to line up.
The good news is, you don't actually use it like this, so it's rarely a problem in practice. It only comes up when you are synchronizing the sights.

Somethings just don't line up perfect. It's possible that something is lightly out of alignment, but on my AR that's co-witnessed, the rear sight is cranked over to the right to get alignment.

The question is, can you align it. Can you get both the dot and the sights to line up so you can sync them. You never use them together so as long as you can sync them, then the job is done and you call it a day and go shooting.

Does the TRS come with a lower riser ? I'd use that one if it were me, I prefer full co witness, not because of the co-witness, but jsut because having the sight at that slightly lower high is more natural for me.
 
No, it only came with the high riser. I haven't had it to the range to see which sight is right (I guess that would show what system is the problem- iron or red dot). I guess, as long as the iron sights are on target, I can zero the redo dot to match that, and it doens't matter what the co witness is?
 
Pretty much. You never really use them at the same time.

I sometimes use my rear as a pinhole to make for a sharper dot for long range shots, but you don't need alignment to do that, you just have to be able to see thru' the dot while looking thru' the hole. Might not work well with 1/3rd.
 
alberta5492 said:
I haven't had it to the range to see which sight is right (I guess that would show what system is the problem- iron or red dot). I guess, as long as the iron sights are on target, I can zero the redo dot to match that, and it doens't matter what the co witness is?
Click to expand...

Yes.

I'd guess that your rear iron might be wonky (or at least a poor fit for this rifle), and it's possibly exacerbated by the windage misalignment your rifle shows. (looking at an angle through the optic reduces the field of view, making the cowitness appear lower in the field than it actually is)
 
Zero the iron sights then leave them folded down till your Bushnell craps out and then remove it and use the irons until the optic is back from warranty.
Co-witness is stupid anyway and just clutters up your field of view.
If you bought them from eBay don't worry, they will fall apart soon anyway and will be out of the way.
I like the idea of cutting off the front sight and installing a free float rail that was suggested earlier. Will increase accuracy and look better.
 
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