Mec Pro Check - Attaches to the charge bar with the bar stop screw. Programs the charge bar so the loading cycle is kept in sequence and operates wad guide automatically. A handy accessory for the Model 600JR loader; Attaches to the charge bar with the bar stop screw; - At Sportsman's Warehouse, we live for the thrill of the great outdoors. Whether you're hunting, fishing, camping, backpacking, or shooting, having the right gear is key to making every moment unforgettable. That's why we bring you only the highest quality, trusted brands-because your outdoor experiences deserve the best. From expert advice to quality gear and community events, Sportsman's Warehouse is more than a store-we're your partner on every journey. Come explore with us and experience the difference passion makes.