The Monstrum Tactical Mossberg 500/590 Series Picatinny Rail Mount is built for Mossberg 500 and 590 Series or equivalent shotguns. It allows for the mounting of Picatinny or Weaver standard scopes, red dots, magnifiers, or other optics. The rail installs via the included set screws into the Mossberg factory mounting holes. Crafter from lightweight aluminum, …