Nighthawk Custom Custom Defensive Fixed Rear Sight Two 0.077in TRIJICON Tritium Inserts. The rear face of the sight is serrated to eliminate glare while the rest of the sight boasts soft smooth edges to provide for snag-free carry with a sleek profile. Some fitting may be required Specifications for Nighthawk Custom 1911 Defensive Fixed Rear Sight: Manufacturer: Nighthawk Custom Gun Make: 1911 Platform Gun Model: 1911 Rear Sight Color: Tritium Gun Type: Pistol Rear Blade Height: 0.325 in Illumination Color: Green Package Contents: Nighthawk Custom 1911 Defensive Fixed Rear Sight Nighthawk Custom SI0017-S: Custom Defensive Fixed Rear Sight Two 0.077in TRIJICON Tritium Inserts