Mossberg 940 Pro Field Black Anodized 12 Gauge 3in Semi Automatic Shotgun - 28in - 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/rings, magazine tube, hammer/sear, shell stop), enlarged/beveled loading port, elongated elevator, and anodized follower for smooth operation. Outside, an adjustable stock allows for 1.25 of LOP flexibility, the stock and streamlined forend feature Mossberg signature texturing for a secure grip, and a front fiber optic sight helps keep you on target. View all Mossberg 940 Pro Semi Automatic Shotguns.