Designed in conjunction with World Champion shooter Jerry Miculek, the Mossberg 940 JM Pro is feature-rich, fast-cycling, and ultra-competitive. These 940 JM Pro autoloaders were built to compete and win. Inside, you will find a durable gas system that allows for up to 1500 rounds between cleaning, nickel boron-coated internal parts for smooth operation, and a competition-level loading port, elevator, and follower. Outside, an adjustable stock and streamlined forend sport Mossberg signature texturing, while a host of stylized, functional components combine for competition- to optimize speed, accuracy, and durability. FeaturesClean-running gas-vent systemQuick-empty Magazine ReleaseBuilt for Quad LoadingAdjustable Length of PullDrilled and Tapped ReceiverAdjustable Stock Drop SystemBriley Choke TubesHIVIZ TriComp Fiber Optic Sight