TRIJICON HD NS FOR GLK21 ORG OUTLINE: The three dot green tritium night sight set's front sight features a taller blade and an aiming point ringed in photoluminescent paint while the rear sight is outlined in black and features a wider U-shaped notch. This unique configuration increases visibility and quickens front sight acquisition-even in transitional lighting.

Features :

• Tritium-Phosphor lamp
• Sapphire window
• Protective clear coat and high visibility colored front sight post
• U notched rear sight
• Silicone rubber cushion
• Subdued rear sight