Features Injection molded high strength polymer construction Patented four channel converging magazine (FCCM) technology for maximum capacity High tensile strength spring ensures reliable feeding Bullet windows show how many BBs you have left in the magazine Mock round count for added realism No rattling sounds unlike high capacity magazines 130 Round capacity Factory spare magazine Manufacturer: G&G Specifications: Weight: 140g Capacity: 130 rounds Compatibility: For G&G TGM series MP5 and other compatible MP5 Series Airsoft AEG Material: Aluminum / Metal / ABS