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x-ray 3 Sights

This is a discussion on x-ray 3 Sights within the SIG Sauer Pistols forums, part of the SIG Sauer Forum category; Question to the Legion owners, does anyone one have the x-ray 3 sights with the "U" shaped rear sight. I had the Trijicon HD sights ...


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Old 01-02-2016, 08:15 AM   #1
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x-ray 3 Sights

Question to the Legion owners, does anyone one have the x-ray 3 sights with the "U" shaped rear sight. I had the Trijicon HD sights on my Glock and really liked the way that front orange dot fitted into the rear U shaped sight. Very quick target picture. I'm thinking of getting the x-ray 3 sights for my MK25 and curious to anyone's feedback. That front green dot looks like it would be really easy to see with my tiered old eyes. Thanks.
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Last edited by Gray Beard; 01-02-2016 at 08:18 AM.
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Old 01-02-2016, 08:57 AM   #2
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Originally Posted by Gray Beard View Post
Question to the Legion owners, does anyone one have the x-ray 3 sights with the "U" shaped rear sight. I had the Trijicon HD sights on my Glock and really liked the way that front orange dot fitted into the rear U shaped sight. Very quick target picture. I'm thinking of getting the x-ray 3 sights for my MK25 and curious to anyone's feedback. That front green dot looks like it would be really easy to see with my tiered old eyes. Thanks.
The X-rays on my stock Legion 226 are square notch and it's fairly narrow. That said, they're easier to pick up than usual run of the mill night sights. They're more accurate than Trijicon HD's, which I have on my HKs, but sight acquisition is faster on the HD. For that reason, I outlined the X-ray front sight with orange acrylic paint to get the best of both worlds, and I did so because I'm also older with eyes that aren't what they used to be. Both work, but for defensive shooting inside of ten yards where speed is king, I much prefer the HD sights over the X-ray if forced to make a choice, but the X-rays as modified aren't so bad that I feel the need to replace them.
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Old 01-02-2016, 09:24 AM   #3
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Originally Posted by Col J Casey View Post
They're more accurate than Trijicon HD's, .
That's an interesting observation - - why is that is so?

I do think that combat sights (and hold), as opposed to 6 o'clock bullseye, is less precise for paper targets but has advantages for combat shooting. I would have thought that both these sights would be the same in that regard.

It's my understanding that Trijicon makes both the HD (round rear notch) and the X-ray sights used on the Legion. I haven't measured, but guessing the blade and notch dimensions, though not the notch shape obviously, would be the same?

I agree the HD's are quick to acquire, I have them on two Sigs and like them a lot. Though if being picky, some of the edges on the rear sight are sharper than they should be. I talked to Trijicon about this and they said they were modifying them to make that less so. They said I could return them for that change, but if I did it myself that would void the warranty.

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Old 01-02-2016, 11:07 AM   #4
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That's an interesting observation - - why is that is so?

I do think that combat sights (and hold), as opposed to 6 o'clock bullseye, is less precise for paper targets but has advantages for combat shooting. I would have thought that both these sights would be the same in that regard.

It's my understanding that Trijicon makes both the HD (round rear notch) and the X-ray sights used on the Legion. I haven't measured, but guessing the blade and notch dimensions, though not the notch shape obviously, would be the same?

I agree the HD's are quick to acquire, I have them on two Sigs and like them a lot. Though if being picky, some of the edges on the rear sight are sharper than they should be. I talked to Trijicon about this and they said they were modifying them to make that less so. They said I could return them for that change, but if I did it myself that would void the warranty.
Would you recommend just getting the hd's for just the front site and use the sig nights sights on the rear? Or is it best just to get the set? Don't mind the rear but would like a better front site. Thx
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Old 01-02-2016, 11:21 AM   #5
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x-ray 3 Sights

I've got the square notch in my rear sight on my 226 Legion

I'll tell you what......I've never shot as well as I have with these sights. I love them. I think all my Sigs are gonna inherit a set slowly but surely




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Old 01-02-2016, 11:34 AM   #6
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I've got the X-Ray's on my Legion (square notch), and HD's on my P220 (u-notch). I wouldn't say that I prefer one over the other, although the HD's stand taller- I like the lower profile of the X-Rays.
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Old 01-02-2016, 11:49 AM   #7
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I would agree that both are easy to pick up and shoot accurately. I have the HD's on most of my Glocks and really see little difference in shootability between them and my Legion's.
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Old 01-02-2016, 12:20 PM   #8
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That's an interesting observation - - why is that is so?

The HDs are less accurate because the rear sight aperture is bigger. Therefore, a greater potential error is induced because perfect sight alignment is somewhat, however slight, more difficult to achieve. So, when using a flash sight picture in a defensive scenario, the spread at the extremes is wider with the HDs or similar combat sights than it is with a more traditional design. It doesn't look like much of a difference holding the two together horizontally, but the aperture as a whole is bigger. At common distances of 10 to 12 feet or less, it doesn't make a significant difference, but at 7 yards, it starts to get iffy. I've carefully measured that using the standard technique on a subcompact. If you buy into the theory that a large(ish) spread is desirable to get separate wound channels, then OK, but there's a counterargument to that when it gets real. Also, some have noticed that the HDs can cause a noticeable change in POI, and therefore, necessitate a different hold/sight picture too, but I haven't experienced that on my so-equipped HKs, at least at typical combat distances. Finally, IMHO, the orange contrast in the front sight makes true front sight focus easier, and more "automatic," than when the front and rear are the same color. Nevertheless, for self defense, I prefer the HDs. At 15 yards or more, I'd be using a more standard sight. The X-rays work OK for me out to fifty yards. That distance would get very tricky for me with the HDs, but I'm no Wyatt Earp.

Last edited by Col J Casey; 01-02-2016 at 12:37 PM.
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Old 01-02-2016, 05:18 PM   #9
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Well I went ahead and placed an order for x-rays with the U rear notch. 2tango2's and hodge's replies were what I was hoping to hear. Granted Sig's #8 front and rear sights are no where near the height of Trijicon's HD which I actually like, less apt to get caught on something. And I really think that green glowing dot will help me focus better on the front sight especially looking through progressive lens.

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Old 01-03-2016, 09:00 AM   #10
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The HDs are less accurate because the rear sight aperture is bigger. Therefore, a greater potential error is induced because perfect sight alignment is somewhat, however slight, more difficult to achieve..
I just measured the rear notch on my HD's at 0.168", the front blade is 0.150". Held at arm's length the "daylight" between the front blade and notch on each side does not seem excessive to me at all. I do want some gap, as it allows for better accuracy in varied lighting conditions. As is, the orange dot quickly comes into place in the U shaped notch and is all the accuracy I require for defensive shooting.

In trying to find the specs on line to verify if, as you say, the HD's aperture is bigger, I found this spec that indicates the HD is actually *smaller* based at least on my measurement above. Note that this site is saying the X-ray back notch is 0.180" wide (or .012" wider than the HD). BUT, if you look at this site's spec for the front blade width, that figure is clearly screwed up, as we all know the front blade is not almost half an inch wide!!

Sig Sauer's New X-RAY Tritium Sights - The Firearm Blog

If someone has a Legion and a caliper, please post the specs on blade and notch width.
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Old 02-18-2016, 02:46 PM   #11
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I am in the market for night sights for a Glock17. I often order various optics from http://www.atncorp.com/smart-hd-optics for my coyote hunting needs, and happened to come across Trijicon's thermal weapon sights, which are pretty impressive. Now, the Trijicon HD sights have my interest but I am also considering the standard 3 dot. So, if you've used the Trijicon HDs, what do you think are their pros and cons compared to factory 3 dot night sights?
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Old 02-19-2016, 08:58 AM   #12
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I am in the market for night sights for a Glock17. I often order various optics from Smart HD Optics: rifle scope, weapon sight, binocular and HD Gun Camera from ATN corp for my coyote hunting needs, and happened to come across Trijicon's thermal weapon sights, which are pretty impressive. Now, the Trijicon HD sights have my interest but I am also considering the standard 3 dot. So, if you've used the Trijicon HDs, what do you think are their pros and cons compared to factory 3 dot night sights?
I had factory night sights on my handguns...tried Trijicon HDs on one, now they all wear them. Mucho grande easier for me to pick up and focus, and maintain that focus, on the front site. I have the orange fronts and wanted the contrast between the fronts and rears.
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Old 02-19-2016, 10:04 AM   #13
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Would you recommend just getting the hd's for just the front site and use the sig nights sights on the rear? Or is it best just to get the set? Don't mind the rear but would like a better front site. Thx
I have Front only Orange Trijicon HDs on 2 Glocks, and my P227.
They are a lot faster to acquire than even the TFO front sights on my other Sigs.

When I was in GT Distributers, I had a chance to compare the Trijicon HD front only to both front and rear.

For SD or CC, I didn't think the rear sight made much difference, if any.

For a range only gun, I wouldn't use the Trijicon HD. Although the front sight is MUCH quicker to acquire, it's on the large side, and slightly less accurate for bullseye shooting. It's a "Combat" sight, not a "Target" sight.

I will eventually have them on the front of any gun I use for SD/HD or carry.
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Old 02-19-2016, 10:05 AM   #14
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love them on my legion.

definitely getting them for the p320.
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Old 02-19-2016, 01:02 PM   #15
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I have the P226 Legion with these new sights and a G21 Gen4 with the Trijicon HD (orange) sights. I really like the Sig sights on the Legion and have no plans on replacing them, but I have to honestly say, at least for me, that I find the Trijicon HDs on my G21 easier to pick up because they are brighter (Orange front) in the daylight (especially when shooting in direction of the sun... sun behind target or bright sky).
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