This replacement or spare magazine is compatible with your AR-15. 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	223 Remington/5.56 NATO
Capacity	30
Finish	Black
Model	AR-15
Material	Steel/Polymer
Type	Magazine
Model Fit
Brand Fit
Max Capacity	30