VFC 30rds BCM Gas Magazine for VFC/ Umarex/ BCM M4/ 416 GBB

VFC 30rds BCM Gas Magazine for VFC/ Umarex/ BCM M4/ 416 GBB Metal Construction 30 Rounds Loading Capacity Magazine Works with both Green Gas & HFC 134a Gas Suitable for VFC/ Umarex/ BCM M4/ 416 Series Airsoft Gas Blow Back GBB Rifle Airsoft Guns Engraved "BCM" Marking For 6mm Plastic Bullet only Best accompanied with Plastic Bullet Loading Too or Speed Loader