Fits Sig Sauer models calibrated for 9mm and .357SIG, including P225, P226, P228, P239, and P320 (Excluding P938).Designed with the ever-evolving needs of law enforcement in mind, Trijicon HD XR Night Sights build on the features of current HD sights but provide the next level of advanced target identification and engagement at increased distances. Trijcon HD XR Night Sight Sets are not compatible with the Glock MOS pistol platform. Professional installation recommended. Trijicon HD XR Night Sight FeaturesThinner front sight posts allow shooters to have a larger field of view, enhancing the ability to see targetsGreen Tritium lamps are warranted for 12 years from date of manufactureSpecifications: Trijicon HD XR ™ Front Sight - for Sig Sauer® #8 Front SG601-C-600867