The Mossberg 940 Pro Thunder Ranch Semi-Auto Shotgun comes optic-ready, with patent-pending receiver cuts that accept low-profile direct mounting of Shield RMSc-pattern micro dot sights- for improved eye alignment and target acquisition. Chock full of additional features, this shotgun - with design input provided by Thunder Ranch President and Director Clint Smith, is equally well-suited for a day at the range or put to use for home security needs.FeaturesOptics Ready (Shield RMSc-Pattern)Drilled and Tapped ReceiverClean-Running Gas Vent SystemQuick-Empty Magazine ReleaseAdjustable Length of Pull (12.5" - 14.25")Barrel Clamp with M-LOK Mounting SlotsQD Sling Ports on Stock and Forend