The Top Gun for 3-Gun - Now Comes Optic-Ready. Patent-pending receiver cuts and a removeable cover plate allow direct mounting of Shield RMSc-pattern micro dot sights for imporved eye alignment and faster target aquisiton. Inside every 940 JM Pro you will also find a new durable gas system specially-coated or finished internal parts for smooth operation and a competition-level loading port elevator and follower. Outside a user-adjustable stock and streamlined forend sport Mossberg signature texturing while a host of stylized functional components combine for competition - optimizing speed accuracy and durability.