This replacement or spare magazine is compatible with your Springfield Armory M1A, M14. 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	308 Winchester/7.62 NATO
Capacity	20
Finish	Black Parkerized
Model	M1A/M14
Material	Steel
Type	Detachable
Model Fit	M1A/M14
Brand Fit	Springfield
Max Capacity	20