Magazine is compatible with your Springfield Armory XD-S. It comes with a black sleeve to accommodate backstraps 1 & 2. (Backstraps not included)
Specifications:

Caliber	40 Smith & Wesson (S&W)
Capacity	7 rd
Finish	Silver
Model
Material	Metal
Type	Replacement
Model Fit	XD-S
Brand Fit	Springfield
Max Capacity	7