I don’t normally think of sights as “optics” per-se, but Sig Sauer’s Electro-Optics division is rolling out their new X-RAY pistol sights. They’re a 3-dot tritium system, but these tritium inserts maintain a clean white color in daylight. You may have already seen them on Sig’s Legion series of handguns. The front sight is a green donut made from flourescent polymer with a distinctly smaller tritium dot in the center, while the rear white dots illuminate in low light.

I will confess to owning night sights where all 3 dots are the same size and color. It’s not ideal, so at first glance the Sig setup looks good.

The sights have been tested to 20,000 rounds and the tritium is expected to have a 10 year lifespan. Sig is also pitching a 5 year warranty on the tritium components if they end up fading faster than expected.

The new X-RAY sights are available with a square notched rear sight, or a U shaped notch, and designed to fit a whole host of Sig pistols. If you’ve got any of the following, the new sights will fit your gun: P220, P226, P228, P229, P239, P320, P250, P938, P238

The idea here is that the X-RAY sights will perform equally well in day or night conditions. According to Sig, “there’s no more changing sights from night to day patrols.” I had no idea that was a thing people did. It sounds time consuming.

MSRP on the X-RAYs is right at $130, so they’re playing in the same pool as Trijicon and Meprolight. It will be interesting to see how Sig’s white-in-daylight tritium stacks up against more established night sights. The X-RAY sights are shipping right now.

If you love diagrams and finely detailed measurements, check out the charts below.

Phil Note: These are also the sights on the Legion I reviewed earlier:https://www.thefirearmblog.com/blog/2015/10/05/review-sig-sauer-introduces-legion-series-new-legion-p-229/