This drum replacement or spare magazine is compatible with your Springfield Armory M1A, M14. It is constructed of DuPont Zytel polymer with injection molded mag follower and stainless steel mag spring. Made in the USA.
Specifications:

Caliber	308 Win
Capacity	50rd
Finish	Black
Model	Standard
Material	DuPont Zytel Polymer
Type
Model Fit	M1A
Brand Fit	Springfield Armory
Capacity	50