This replacement or spare magazine is compatible with your gsg firefly.
Caliber: 22 LR
Capacity: 10rd
Finish: Black
Model: OEM
Material: Steel
Type: Detachable
Model Fit: Firefly
Brand Fit: GSG
Capacity: 10
Caliber: 22 LR
Capacity: 10rd
Finish: Black
Model: OEM
Material: Steel
Type: Detachable
Model Fit: Firefly
Brand Fit: GSG
Capacity: 10