GHK 30rd Magazine for M4 GBB Drop-in Gearbox / G&G Airsoft M4 GBB Rifles (Version 1)
Compatibility: For G&G M4 (version 1) Series GBB Rifles / GHK Drop-in M4 GBB Gearbox
Capacity: 30rds
Gas Type: Green Gas
Manufacturer: GHK
Disclaimer: Not compatible with G&G GBB v.2 M4.