This replacement or spare magazine is compatible with your AR-308/308 Cal AR type rifles using LR-308 (DPMS) or SR-25 pattern mags. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA. NOTE: This item is not compatible with rifle using Armalite pattern magazines.
Specifications:

Caliber	308 Winchester/7.62 NATO
Capacity	20
Finish	Black
Model	DPMS LR-308
Material	Polymer
Type	Detachable
Model Fit	LR-308
Brand Fit
Max Capacity	20