ProMag DRMA1 Standard 50rd Drum 308 Win/7.62x51mm NATO Fits AR-10 Black DuPont Zytel Polymer

This drum replacement or spare magazine is compatible with your AR-308 using LR-308 (DPMS) or SR-25 pattern magazines. It is constructed of DuPont Zytel polymer with injection molded mag follower and stainless steel mag spring. Made in the USA.