Nighthawk Custom 366-T Heinie Ledge Rear Sight w/Tritium Taller for AAC Suppressor. The increased height makes this sight ideal for any shooter using a full-time suppressor. This is the original Heinie sight design that utilizes a .125 rear notch width. The rear face of the sight is serrated and a smooth front leading up to the ledge clear of any snag points for easy carry. The serrations on the rear of the sight eliminate glare from light sources while aiming. The Ledge rear sight is designed to help shooters rack the slide with a single hand. This rear sight requires machining of the slide for installation. Heinie recommends having a competent pistolsmith install these sights. Some fitting may be required Specifications for Nighthawk Custom 366-T Heinie Ledge Rear Sight: Manufacturer: Nighthawk Custom Gun Make: 1911 Platform Gun Model: 1911 Color: Black Front Sight Color: Tritium Sight Style: Suppressor Height Front Material: Tritium Gun Type: Pistol Rear Blade Height: 0.325 in Illumination Type: Tritium Mount Type: Dovetail Package Contents: Nighthawk Custom 366-T Heinie Ledge Rear Sight Nighthawk Custom SI0036: 366-T Heinie Ledge Rear Sight w/Tritium Taller for AAC Suppressor