This replacement or spare magazine is compatible with your S&W M&P. 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	22 LR
Capacity	10rd
Finish	Oxide
Model	Standard
Material	Steel
Type
Model Fit	M&P
Brand Fit	S&W
Capacity	10