EMG Hexmag Licensed 230rd Polymer Mid-Cap Magazine for M4 AEG Rifles (Black / Red)Features High strength nylon reinforced polymer construction Improved follower, reinforced spring, and improved fitment to reduce shake Works great with high rate of fire AEG's Extremely strong and light weight Unique hexagon pattern for greatly improved grip Hexmag HexID color identification system allows the user to color code magazines for specific purposes loads or to differentiate mags from teammates Licensed Hexmag magazine Hexmag Airsoft