The Trijicon Bright & Tough Suppressor 3-Dot Night Sight Set for Sig Sauer .40 S&W and .45 ACP handguns are designed to be used with a suppressor, where standard 3-dot sights don't work. The front and rear sights have white rings and green dots, illuminated by Trijicon's tritium phosphor lamps, which require no batteries and are warranted to work for 12 years from the date of manufacture.

The lamps are housed in aluminum cylinders to protect them from recoil impacts and harsh cleaning solvents, cushioned with silicone for further shock protection, and feature sapphire windows which distribute the green light evenly and keep out foreign objects and substances.