This is a Truglo Sight known as the Brite-Site, model TG13GL3A.
Glowing bright both day and night" TFX(TM) sights are always ready. TFX(TM) takes their award-winning Tritium + Fiber-Optic technology even further with all the features their customers requested: compact snag-free design" longer sight radius" and amazingly durable construction built to handle just about anything. Illuminating elements are encased inside a virtually indestructible chemical and shock-resistant capsule and the CNC-machined steel is protected with a rust-proof FORTRESS FINISH(TM). There is even a highly visible white ring surrounding the front fiber to make it even more visible" encouraging the eye to rapidly focus on the front sight for a fast and accurate sight picture. TFX(TM) sights will amaze even the most discriminant shooters.
Features:
Fully protected TFO® technology encapsulated in a virtually indestructible configuration
Unmatched visibility in all shooting conditions 24/7
Utilizes quality Swiss tritium for maximum brightness
Glows in the dark
Concealed fiber can not be seen by target
Fits standard holsters
