TRUGLO Tritium X, Sight Set, For Glock 42 and 43, Green Tritium, White Ring on Front Sight TG-TG231G1XAW You count on your handgun to be reliable in any situation. Your sights should be held to the same standard-which is why TRUGLO TRITIUM-X sights are made from solid steel and treated with a nitride FORTRESS FINISH to handle just about anything. SWISS TRITIUM lamps provide a bright and constant glow in low light or even complete darkness. Tritium does not require any batteries or light exposure-it simply glows!