Lightweight scope rail with backup iron sights mounts to Marlin lever rifles without drilling and trapping. Features a large light-gathering rear ghost ring and high-visibility front post sight for fast sight acquisition during day or low-light conditions. Rear ghost ring is fully adjustable for windage and elevation, and includes interchangeable .191" and .230" diameter apertures for fine-tuning accuracy. One-piece front sight has easy-to-use .100" wide, white-line post. Rail accepts Picatinny or Weaver-style mounts. Extra-long design allows scope mounting directly over the receiver, or forward over the barrel with intermediate eye relief optics or red-dot sights. Requires re Mfg: Xs Sight Systems SPECS: Lever Rail - Aluminum, black, matte finish. 11" (27cm) long, .830" (21mm) wide. 3 oz. (85g) weight. Includes mounting hardware. Sights - Steel, black, matte finish. Ghost Ring Apertures - .191" (4.8mm) and .230" (5.8mm) I.D. Front Post - .100" (2.5mm) wide white line.