Mossberg 940 Pro Thunder Ranch 12 Gauge 3" 7+1 18.50" Cylinder Bore, Patriot Brown, Optic Cut Rec, Synthetic Furniture with QD Sling Mounts, Adj. Shim Stock, Fiber Optic Sight. The 940 Pro model comes optic-ready, with receiver cuts that accept low-profile direct mounting of Shield RMSc-pattern micro dot sights for improved eye alignment and target acquisition (a cover plate is included for when an optic is not in use). Inside, you will find a durable gas system that allows for up to 1500 rounds between cleanings and a host of corrosion-resistant internal parts/finishing (nickel boron-coated gas piston, magazine tube, hammer and sear); plus an enlarged/beveled loading port, elongated elevator and anodized follower for smooth operation. Outside, the adjustable LOP and comb allows for 1.75" of LOP flexibility; the stock and streamlined forend feature Mossberg signature texturing for a secure grip; a barrel clamp provides accessory flexibility via M-LOK mounting slots and a front fiber optic sight helps keep you on target."/\