Tritium Rear Sight for Glock® Green Tritium single dot No Outline .451 H .165" Sq Notch"
Fits all Glock models (excluding 42, 43, 48)
Rear sight with two tritium lamps and white outlines
Rear sight with round notch, two green tritium lamps with white outline
Rear sight with two tritium lamps and black outlines