This extended replacement or spare magazine is compatible with your Springfield Armory XD-S. It is constructed of heat treated steel with injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA.
Specifications:

Caliber	45 ACP
Capacity	8
Finish	Blued
Model	Springfield XD-S
Material	Steel
Type	Detachable
Model Fit	XD-S
Brand Fit	Springfield
Max Capacity	8