Specifications Manufacturer: Sentinel Gear Material: Injection molded polymer BB Capacity: 1500 BBs Compatibility: Most mid-capacity M4 magazines Color: Blue Features 1500 round capacity Compact speedloader that can hold a lot of BBs while not being too bulky This speed loader is able to fit into double stack M4/M16 magazine pouches which makes it easier to carry on the field Each rotation of the crank loads about 10-12 BBs The integrated winding clutch prevents magazine overfilling