The concept of the XS Big Dot Night Sights is simple: for the purposes of very fast acquisition in critical situations, make the Front Sight post as easy to find as possible by enlarging its size and remove as much noise as possible from the Rear Sight:

These are Trijicon illuminated sights, nice bonus.
EDIT/UPDATE: These are now available for $80 shipped - many reputable sellers on eBay provide it.
The Sights come with all the tools and instructions needed. There are also YouTube videos. I just used the instructions and tools included and I was done in less than 15minutes, I think.
Some pics:

At home:
There is instant gratification as I pull it up and check the sight picture. The Dot is exceptionally quick to find.
I am pleased with the ease of installation, all the necessary tools included and more importantly, the functionality and practicality of my investment. The quality is top notch.
I took it to the range to test it with 150 rounds:
The first few magazine definitely takes some getting used to. My shots were all over the place. Shooting left, right, high, low .... Did I install these sights wrong??? By the end of the session, however, I got the hang of it pretty well, and my groups are nearly as tight as they were with the stock sights from close range. I can see with a little more practice I can get much better at this.
Also, I did some strong hand shooting, the large Front Sight is very quick and easy to find. I can imagine this may be very useful in a high stress situation.
You put that Giant Dot on the Bad Guy's chest, keep your aim and pull the trigger:

Low Light Conditions:
The illumination is very bright, just like anything by Trijicon. I also do not regret getting the "Express" Sights (only Front is illuminated), as opposed to the "24/7" version (front and rear illumination). After some testing, I think I can do just fine with these.
Lastly, I tested the rear sight for one-handed slide racking on my belt and I was even able to easily rack the slide on the pocket of my cargo shorts... there is plenty of leverage from the rear sight to do it.
These sights are not the sights for precision accuracy. They are for Gunfighting. Highly recommended for those who can appreciate the value of an enlarged front sight in a high-stress situation and are willing to exchange some "range shooting" accuracy for it.
*** 8-month review update: Click HERE ***

These are Trijicon illuminated sights, nice bonus.
EDIT/UPDATE: These are now available for $80 shipped - many reputable sellers on eBay provide it.
The Sights come with all the tools and instructions needed. There are also YouTube videos. I just used the instructions and tools included and I was done in less than 15minutes, I think.
Some pics:

At home:
There is instant gratification as I pull it up and check the sight picture. The Dot is exceptionally quick to find.
I am pleased with the ease of installation, all the necessary tools included and more importantly, the functionality and practicality of my investment. The quality is top notch.
I took it to the range to test it with 150 rounds:
The first few magazine definitely takes some getting used to. My shots were all over the place. Shooting left, right, high, low .... Did I install these sights wrong??? By the end of the session, however, I got the hang of it pretty well, and my groups are nearly as tight as they were with the stock sights from close range. I can see with a little more practice I can get much better at this.
Also, I did some strong hand shooting, the large Front Sight is very quick and easy to find. I can imagine this may be very useful in a high stress situation.
You put that Giant Dot on the Bad Guy's chest, keep your aim and pull the trigger:

Low Light Conditions:
The illumination is very bright, just like anything by Trijicon. I also do not regret getting the "Express" Sights (only Front is illuminated), as opposed to the "24/7" version (front and rear illumination). After some testing, I think I can do just fine with these.
Lastly, I tested the rear sight for one-handed slide racking on my belt and I was even able to easily rack the slide on the pocket of my cargo shorts... there is plenty of leverage from the rear sight to do it.
These sights are not the sights for precision accuracy. They are for Gunfighting. Highly recommended for those who can appreciate the value of an enlarged front sight in a high-stress situation and are willing to exchange some "range shooting" accuracy for it.
*** 8-month review update: Click HERE ***
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