Golden Eagle 40rds Gas Magazine For M4 GBBR (MC-318)
 
Polymer Housing Magazine
High-Flow Output Valve
Suit for GHK / WA G5 / M4 Series Airsoft Gas Blow Back GBB Rifle
Magazine can store 40 Round 6mm Airsoft Plastic Pellet
Ready to take Top Gas out of the box
Suitable for 6mm Plastic Bullet only   
Golden Eagel MC-318