Rear Sight Aperture

[Chorizo]

@ColtSeavers

I’ve never had an issue with light ever reflecting back at me/into my eye from the concave cut out/cup nor do I ever remember the aperture becoming oblong either.

My issue is with the sight itself, or at least in conjunction with the front sight post. Trying to line up the center flat point of a W within an O just never made sense to me (though I can do it). It’s why I switched out the front sight post for a lollipop type (KNS .052" ball) and that helped alleviate some of the (probably self created?) metal mind block/nagging as centering a small dot inside of a circle is a lot easier for me.
At least until I noticed that the small aperture is backwards and that started a whole new line of nagging that resulted in the aforementioned stripping and return of a Troy Battlesight.

As mentioned before as well though, I have since switched over to the Diamondhead rear sight that makes a hell of a lot more ‘sense’ to me.

The games our minds play with us…

[ColtSeavers]

@Chorizo

The games our minds play with us…

Too true!

Also, I missed this post whn I edited my last one that you quoted, so to be as forthright as possible and add to the mass (mess?) of information, the Diamondhead rear sight that I have now also has cut outs on both apertures facing away from the shooter as well (double checked last night out of curiosity) just as you and others have experienced.

[Chorizo]

Given your avatar I can see why you are preoccupied with the direction of the sight.

[tog]

@Failure2Stop

The cup really should face away from the shooter.

Very simple reason:
When light from behind the shooter hits the cup it distorts the image that the shooter sees, making the aperture appear to be larger/oblong, making placement of the front sight in the aperture incorrect, causing POI to shift.

A flat sight will uniformly illuminate, permitting POI to remain consistent.

Sent from my VS980 4G using Tapatalk

True, because of the parabolic shape of the “cup”.

[Mike_Miller]

Thanks for everyone contributing in this thread, this is well timed. I just received a .030/.040 aperture that I plan on drilling to ~.046 and .070-.075. I’ll try installing it reversed, now.

[T2C]

@Failure2Stop

The cup really should face away from the shooter.

Very simple reason:
When light from behind the shooter hits the cup it distorts the image that the shooter sees, making the aperture appear to be larger/oblong, making placement of the front sight in the aperture incorrect, causing POI to shift.

A flat sight will uniformly illuminate, permitting POI to remain consistent.

Sent from my VS980 4G using Tapatalk

This makes sense. The effect is more pronounced on the M1 carbine, but I also noticed the POI shift on my AR’s.

[usmcvet]

@El_Cid

Interesting… I had always heard the opposite. The story I’m familiar with was that the original set up was with the “cup” facing away from the shooter. Colt started making some reversed and the industry followed suit.

I actually prefer the Troys because the cup is not facing my eye. I would think the “cup” would stand a better chance of reflecting light into the shooter’s eye. In the real world, I suspect it doesn’t really mater much either way, and is the kind of minutiae we shoudn’t worry over anyway.

Awesome Signature line!

I have to say I’ve never noticed they differences. I always thought the cup faced the shooter. I have Troy Sights just g
Have not noticed.

[monadh]

I have a KAC 200-600 Micro rear sight. The cup faces my eye, and this sight is clearer to my astigmatic eyes than any other, be it the standard or match A2 rear or Troy BUIS. The aperture is crisp for me. Is it because the cup faces my eye? I don’t know, but I have replaced all of the Troy rear sights with KAC, and I shoot tighter groups at 200-400 with the KAC than any other.

[jb1911]

My Colt carry handle has the flip over large/small aperture and the cup faces one way on one and the opposite way on the other.

[El_Cid]

@monadh

I have a KAC 200-600 Micro rear sight. The cup faces my eye, and this sight is clearer to my astigmatic eyes than any other, be it the standard or match A2 rear or Troy BUIS. The aperture is crisp for me. Is it because the cup faces my eye? I don’t know, but I have replaced all of the Troy rear sights with KAC, and I shoot tighter groups at 200-400 with the KAC than any other.

I just googled that rear and it looks to me more like a hooded rear sight (which is better IMO). It’s not really the same as the cup on the traditional rear.

It also appears to be hooded on both the shooter side and the muzzle side.

@usmcvet

Awesome Signature line!

I have to say I’ve never noticed they differences. I always thought the cup faced the shooter. I have Troy Sights just g
Have not noticed.

Thanks! Yea - I can’t recall how it was on the M16A1’s I started with many years ago. Most AR’s now have the cup toward the shooter which is why I tend to buy Troy flip ups.

[monadh]

It is cupped. If that actually makes a difference is irrelevant to me as long as I can see.