Kensight SLAM Fixed Rear 1911 Night Sight Black. The 860-668 rear sight features a recessed blade to Reduce glare a large relief cut for an excellent silhouetted sight picture and two .077" with Green tritium lamps with a white outline. All Kensight sights are Wire-EDM cut from a solid block of 4140 steel not to be confused with other sights that metal injection-molded (MIM) or investment cast and heat treated to a hardness of RC 38-40 ensuring tight part-to-part fit and long-lasting durability. This sight fits the popular Novak LoMount rear sight dovetail cut often found on many factory produced and custom 1911 pistols. This rear sight is paiRed with our ProGlo tritium night sight with a lumi Orange outline that comes with a 0.118'' wide blade and a contoured base that keeps your round-top slide and the sight's dovetail uniform resulting in a clean installation that requires little (if any) filing to accomplish. Compatible with standard Novak type front sight dovetail cuts (0.330" x 65 x 0.075") as typically found on both custom and factory 1911 pistols. Specifications for Kensight SLAM Fixed Rear 1911 Night Sight: Manufacturer: Kensight Gun Make: 1911 Platform Gun Model: 1911 Color: Black Fabric/Material: 4140 Chrome Moly Steel Gun Type: Pistol Front Blade Height: 0.16 in Illumination Type: Tritium Illumination Color: Orange Mount Type: Dovetail Package Contents: Kensight SLAM Fixed Rear 1911 Night Sight Kensight 980-668: SLAM Fixed Rear 1911 Night Sight Black