Tfx tritium night sight for walther p99, ppq - TruGlo Brite-Site TFX Tritium Night Sight For Walther P99, PPQ

The rear site would not slide into position like the original rear site piece. I had to gently file a slight amount off on both sides of the slide base in order to get the new site into position. I love the new site. It actually glows in the dark and is very bright in daylight. In poorly lighted areas it is not as bright as I had hoped, but the original site was no different there either. It actually works best when in slight lit areas having the light at your back.