Tokyo Marui 300-round high-capacity magazine engineered for extended gameplay without frequent reloads. Durable metal construction withstands competitive skirmish and tournament use. Features a large thumb dial and integrated bottom winding wheel for rapid reloading during intense matches. Accepts standard 6mm plastic BBs and fits Tokyo Marui M4, M4 RIS, SR16, M16A1, M16A2, M16VN, and M733 series airsoft rifles. Ideal for players seeking reliability and sustained firepower on the field.