This is a Trijicon Sight known as the HD, model SP102-C-600751.
The HD Night Sights were specifically created to address the needs of tactical shooters. 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. Additionally" the front surface of the rear sight is steeply hooked to assist in emergency one-handed slide operation.
Features:
Tritium-Phosphor lamp
Sapphire window
Silicone rubber cushion
Protective aluminum cylinders
Protective clear coat and high visibility colored front sight post
U notch rear sight
Subdued rear sight
Fits the Springfield XD-S series
