Kensight DAS 1911 Defense Adjustable Rear Sight Tritium Insert Night Sight w/ Serrated Blade Fully Adjustable Black. This rear sight by the experts at Kensight is wire-EDM machined from 4140 chrome-moly steel that is then heat treated to a hardness of RC 38-40 ensuring tight part-to-part fit and long-lasting durability. The Kensight DAS 1911 Defense Adjustable Night Rear Sight w/ Tritium Insert & Partially Serrated Blade is a great versatile sight upgrade for a concealed carry or duty pistol. Specifications for Kensight DAS 1911 Defense Adjustable 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 Illumination Type: Tritium Package Contents: Kensight DAS 1911 Defense Adjustable Rear Sight Tritium Insert Night Sight w/ Serrated Blade Kensight 860-636: DAS 1911 Defense Adjustable Rear Sight Tritium Insert Night Sight w/ Serrated Blade Fully Adjustable Black