High strength polymer construction Ruggedized and durable magazine body Mid-Cap design provides an ample round count without the rattle of a high-cap magazine High tensile strength spring ensures reliable feeding Dot matrix on magazines helps mark magazines as your own Receiver bump stop prevents magazine from over insertion Compatibility: For ARES, Tokyo Marui, G&P and other compatible M4/M16 series Airsoft AEG rifles Capacity: 100rds