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Bill Bryant
09-10-09, 13:57
I've seen a set of photos somewhere of an MBUS rear sight with a metal aperture in a flip up with a rounded top. Most pictures I've seen look like the sight aperture is polymer and the flip up is squarish at the top. I just went to the Magpul website and there's no photo.

What does current production aperture flip up look like? Square? Round? Metal? Plastic?
CaptainDooley
09-10-09, 14:20
It's definitely polymer and (without it in front of me), I'm thinking it's squared off on the flipup.
Bill Bryant
09-10-09, 14:24
Follow up question.

Are the large aperture and small aperture concentric?
wake.joe
09-10-09, 14:27
Deleted
CaptainDooley
09-10-09, 14:37
I don't know about swapping apertures - the smaller one actually fits inside the larger aperture, which is always up (the larger that is). I don't know if they're "same-plane" or not though.
Bill Bryant
09-10-09, 14:37
I haven't tried yet, but I plan to.

It LOOKS like you can swap in for a standard metal aperture. :) I'll give it a shot tonight.

I'm new to this. I didn't know there's a "standard" aperture. Who makes it, and what does it look like?
spamsammich
09-10-09, 14:40
They are not same plane.
Bill Bryant
09-10-09, 14:44
They are not same plane.Explain.
spamsammich
09-10-09, 14:46
meaning they are not concentric.
Bill Bryant
09-10-09, 14:51
meaning they are not concentric.Does this look like it was designed that way, or does it look like sloppy execution of what was meant to be concentric?
spamsammich
09-10-09, 14:52
The are not meant to be concentric, they mimic a standard a2 sight aperture. They are by no means sloppy, they are the tightest flip apertures I've used.
Bill Bryant
09-10-09, 14:59
The are not meant to be concentric, they mimic a standard a2 sight aperture. They are by no means sloppy, they are the tightest flip apertures I've used.That's the answer I was hoping for. Thanks. (I've got one in the mail and was curious.)
Bill Bryant
09-10-09, 17:44
One of the places where I saw a picture of the MBUS with a different aperture flip up was in Magpul's 2008 catalog. Here's the link:

http://www.magpul.com/pdfs/2008catalog.pdf

Zoom in on the photo and you'll see what I mean. The bolt-on system for attaching it to the rail is different too. I guess the catalog pic must have been of a pre-production prototype.
Bill Bryant
09-10-09, 17:47
There's an interesting pic on this thread as well:

http://www.ar15.com/forums/topic.html?b=2&f=124&t=160204
sdcromer
09-10-09, 18:50
My MBUS is very different that what is pictured in that catalog. I think those were pre-release renderings.
Bill Bryant
09-10-09, 19:55
My MBUS is very different that what is pictured in that catalog. I think those were pre-release renderings.That makes sense.
ST911
09-11-09, 09:11
They are not same plane. They are polymer.

http://i76.photobucket.com/albums/j18/Skintop911/MBUS/RearOpen.jpg
jmp45
10-02-09, 16:26
I'm interested either the mbus or DD 1.5, haven't decided yet.. The iron sight I have now is on the same plane. Dumb question. If the apertures are not on the same plane what is the difference when you sight? Front tower adjust changes between the two?
boltcatch
10-02-09, 19:30
I would assume that the larger aperature would lower your point of impact, same as the A2 sights do with their larger ( 0-200 ) aperature.

There are a lot of guys around here who would know the specifics on the A2 sights, but if I recall correctly, there have been several variations of the A2 aperatures with minor differences.

I learned to shoot centerfire rifle with the A2 sights and 300m zero, so they come naturally to me, but same-plane seems to be less hassle for most.