This replacement or spare magazine is compatible with your GSG GSG-5. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA.
Specifications:

Caliber	22 LR
Capacity	10rd
Finish
Model	Standard
Material	DuPont Zytel Polymer
Type
Model Fit	GSG-5
Brand Fit	GSG
Capacity	10