Kensight DFS 1911 Defense Fixed Rear Sight Tritium Insert Night Sight w/ Serrated Blade Black. This rear sight by Kensight is designed to include two 0.076" Trijicon green tritium lamps and is wire-EDM cut from a single block of 4140 steel. With distinctive grasping serrations cut into the sides it's no wonder the Kensight DFS 1911 Defense Fixed Rear Sight Tritium Insert Steel Night Sight with Serrated Blade is the popular choice for your 1911 autos. Specifications for Kensight DFS 1911 Defense Fixed Rear Sight Tritium Insert Night Sight w/ Serrated Blade: Manufacturer: Kensight Gun Make: 1911 Platform Gun Model: 1911 Color: Black Fabric/Material: 4140 Chrome Moly Steel Gun Type: Pistol Front Blade Height: 0.2 in Illumination Type: Tritium Package Contents: Kensight DFS 1911 Defense Fixed Rear Sight Tritium Insert Night Sight w/ Serrated Blade Kensight 860-622: DFS 1911 Defense Fixed Rear Sight Tritium Insert Night Sight w/ Serrated Blade Black