Echo1 Metal 300rd M4 High Cap Magazine, Black

Echo1 makes this high-quality 300-round M4 magazine. It works with many famous brands, such as A&K, JG, Tokyo Marui, ICS, KWA, and many more. Less-known brands may have products that accept this gun, but they’re not guaranteed to work.The magazine is made of metal, specifically having an aluminum body. It feels like an actual M4/M16 magazine when empty. You probably can’t tell the difference until loading it.To use this magazine, you have to find the wheel at the bottom of the magazine. Wind it until the pitch changes. A double click means the magazine is fully wound and ready to fire all BBs inside.Rewinding is necessary after using the magazine several times.