Glowing bright both day and night, TFX sights are always ready. TFX takes our award-winning Tritium + Fiber-Optic technology even further with all the features our customers requested - compact snagfree 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-resistant Fortress Finish. The white Focus lock ring surrounding the front fiber makes it even more visible, encouraging the eye to rapidly focus on the front sight for improved speed and accuracy. TFX sights will amaze even the most discriminating shooters. Features: Fully protected TFO technology encapsulated in a virtually indestructible configurationImpervious to oils, chemicals, cleaning solvents and ultra-sonic cleaning processesUnmatched visibility in all shooting conditions 24/7Assembled in USA with quality swiss tritium for maximum brightnessGlows in the dark - no batteries or light exposure requiredFront sight focus lock for fast and accurate shootingConcealed fiber cannot be seen by targetFortress finish provides a permanent protective coating for maximum protectionFits standard holstersEvaluated and recommended by National Tactical Officers' Association (NTOA) field testersPatentedSealed capsule design - provides maximum protection and durabilitySuppressor-height models - available for Glock pistols12 years limited warranty