Armorer Works 350rds Adaptive Drum Magazine for WE M4 GBB Rifle

Armorer Works 350rds Adaptive Drum Magazine for WE M4 GBB Rifle Combination mixture of metal of high quality polymer Construction 350 rounds Loading Capacity Open reservoir cover then fill in BBs Manual Wind Fit 6mm Plastic Bullet only Compatible with standard green gas/propane Suitable for WE M4 Series Airsoft Gas Blow Back GBB Rifle