ProMag Standard Blued Steel Detachable 20 Round for 308 Win & 7.62x51mm NATO AR-10

This replacement or spare magazine is compatible with your AR-308/308 Cal AR type rifles using LR-308 (DPMS) or SR-25 pattern magazines. It is constructed of heat treated steel with blued finish, injection molded mag follower & mag spring formed from heat treated chrome silicon wire. Made in USA. NOTE: Does not fit rifles using the Armalite pattern magazines.