Mossberg 590, Thunder Ranch, Pump Action Shotgun, 12 Gauge, 3 Chamber, 18.5 Barrel, Cerakote Finish, Patriot Brown, Optic Ready (Shield RMSc Footprint), Green Fiber Optic Front Sight, Polymer Furniture, 6 Rounds 50781 This 590 Thunder Ranch was designed in conjunction with Clint Smith, President and Director of the world-class Thunder Ranch facility. Along with characteristic 590 features, this model features an optic-ready receiver, Cerakote barrel and receiver with logo engraving.