The Mossberg 940 Pro Waterfowl Shotgun combines mallard-dropping power and field-ready durability with an optics-ready receiver. Featuring the 940 Pro's redesigned gas-vent system with enlarged loading port, elongated elevator, and anodized follower for smooth operation, this performance shotgun shoots reliably for up to 1,500 rounds before you need to clean it. The 940 Pro's drilled and tapped receiver features cuts that allow direct mounting of Shield RMSc-pattern micro dot sights to offer improved eye alignment and target acquisition. Inside, the 940 Pro boasts a full suite of corrosion-resistant parts, including a boron-nitride coated gas piston, mag tube, and hammer and sear. For additional protection, this model features a coated return spring tube, chrome-lined chamber and bore, and a stainless return spring to help deal with wet conditions. Synthetic stock is adjustable for drop and cast. HiViz Comp Sight fiber-optic front sight. Redesigned gas-vent system shoots reliably for up to 1,500 rounds between cleanings Optics-ready receiver accepts Shield RMSc footprints; additional plated not included Corrosion-resistant internal components Coated return spring tube Chrome-lined chamber and bore Adjustable for drop and cast Fiber-optic front sight