Monstrum Scopes / Optics Ruger 10/22 Extended 14 Slot Picatinny Rail Mount Black. The extra length allows for flexibility in optic placement. Red dots and close range optics can be positioned further forward for more comfortable eye relief. Installs via included set screws into the Ruger 10/22 factory mounting holes. Extended version is 5.5 inches in total length with 13 rail slots versus 4.5 inches with 11 slots for the standard version. Crafted from lightweight aluminum 5.5 inches in length and 1.3 ounces in weight. Specifications for Monstrum Scopes / Optics Ruger 10/22 Extended 14 Slot Picatinny Rail Mount: Manufacturer: Monstrum Color: Black Gun Make: Ruger Features of Monstrum Scopes / Optics Ruger 10/22 Extended 14 Slot Picatinny Rail Mount Extended Length Picatinny rail mount for Ruger 10/22 model rifles - 1 inch longer with more forward extension that standard version - allowing for more flexibility in optic placement. Allows for the mounting of Picatinny or Weaver standard scopes red dots magnifiers or other optics. Installs via included set screws into the Ruger 10/22 factory mounting holes. Extended version is 5.5 inches in total length with 13 rail slots versus 4.5 inches with 11 slots for the standard version. Package Contents: Monstrum Scopes / Optics Ruger 10/22 Extended 14 Slot Picatinny Rail Mount Monstrum RM142: Scopes / Optics Ruger 10/22 Extended 14 Slot Picatinny Rail Mount Black