From CYMA we have a Mid-Cap Magazine for M4/M16’s.
The Magazine
This is a replica of the standard 5.56mm AR-15/M4/M16 STANAG Magazine. It has a 150 round capacity and is constructed from metal with polymer internals. It is loaded via speed loader through the top of the magazine.
Compatibility
This magazine is designed for CYMA’s M4/M16 Series of replicas but is compatible with a wide range of M4/M16’s from many other manufacturers.