Flat-top iron sights

[mightymouse]

I'm a little fuzzy on the physics involved, but...

I'd like to replace the Hayes Research rear sight and retain the Hayes Research front sight.

Ok. Here's the short version.

Not gonna happen. No one else makes a rear BUIS that will line up with that non-standard plane height Hayes front BUIS.

[JohnTRourke]

Originally Posted by michael_aos
I'm a little fuzzy on the physics involved, but...

I'd like to replace the Hayes Research rear sight and retain the Hayes Research front sight.

Think about this for a second. The front sight is in X plane, it's not adustable for elevation (meaning it can't go up and down)
You want a rear sight that goes up and down to match that front sight because your current sight is too low
But even if you get one, where is it going to end up?
That's right, way down low where the other one is.
so, your problem will still be the same.

[michael_aos]

[/I]
Think about this for a second. The front sight is in X plane, it's not adustable for elevation (meaning it can't go up and down)
You want a rear sight that goes up and down to match that front sight because your current sight is too low
But even if you get one, where is it going to end up?
That's right, way down low where the other one is.
so, your problem will still be the same.

Yeah, that's what I figured as well. Thus the discussion.

When I slap a Larue BUIS on there and look through it, everything seems great. I have no idea where it would be shooting though.

Mike

[michael_aos]

Ok. Here's the short version.

Not gonna happen. No one else makes a rear BUIS that will line up with that non-standard plane height Hayes front BUIS.

I'm not surprised. Figured that was coming.

I might be able to stick it on a little picatinny riser though.

[michael_aos]

No one else makes a rear BUIS that will line up with that non-standard plane height Hayes front BUIS.

I expected that.

When I eyeball it, that Hayes Research front sight just doesn't look that much lower than my PRI flip-up or Troy Industries flip-up. Guess it doesn't take much though.

I may mount the Hayes Research and Troy flip-up front on the same rail for comparison.

Mike

[mightymouse]

I expected that.

When I eyeball it, that Hayes Research front sight just doesn't look that much lower than my PRI flip-up or Troy Industries flip-up. Guess it doesn't take much though.

I may mount the Hayes Research and Troy flip-up front on the same rail for comparison.

Mike

If you're going to measure, get or borrow a set of calipers and measure from the bottom of the mount (the rail top) to the middle of the apeture (rear) or post (front) and compare the measurements. If indeed the Hayes are standard height (which they don't look to be) then the problem is how you're aligning your hat rack to get your sight picture.

[michael_aos]

If you're going to measure

Maybe after the cat has finished her nap.

[michael_aos]

If you're going to measure, get or borrow a set of calipers and measure from the bottom of the mount (the rail top) to the middle of the apeture (rear) or post (front) and compare the measurements. If indeed the Hayes are standard height (which they don't look to be) then the problem is how you're aligning your hat rack to get your sight picture.

From the top of the rail, to the top of the post on the Hayes Research fixed front sight measures pretty much exactly 1.0".

Mike

[mightymouse]

Maybe after the cat has finished her nap.

Well I see that you have a target to zero with already.

Top of my Colt HBAR rail to the middle of the USGI Matech rear sight: 1.30

Yah, you're screwed. Either put both your front and back sights on risers (ugh) or get USGI compliant BUIS.

[michael_aos]

Either put both your front and back sights on risers or get USGI compliant BUIS.

As I said in the post that started this topic, I don't much care for the rear sight, but I like the front sight.

I was hoping to avoid it, but I fully expected to have to raise the front sight. Knowing I need to raise it .3" is useful. Thank you.

Now back to the topic of a good elevation-adjustable CQB-type rear sight. We've seen there are several options. Is there anything to distinguish one from the other?

Mike