Tritium Night Sight Sets For GlockA(R) - Fits GlockA(R) 20/21/30/41 (Fxd.)

Nighttime and low light shooting tests prove sights equipped with these glowing dots are easier to see and more accurate than instinctive shooting with standard black sights. Rugged, self-luminous, 3-dot Tritium lamps provide their own long-lasting energy source. Lamps are mounted in silicone-sealed, metal cylinders to give maximum protection from breakage or leakage. Polished sapphire, crytal windows give a bright, crisp and perfectly round aiming dot in low light. Inlaid white rings around eac