ProMag Polymer Magazine AR-308 .308 Win. Black 20 rd.

This magazine fits AR-308 / .308 Cal AR-type rifles using LR-308 (DPMS) or SR-25 pattern magazines. It has a body constructed of a DuPont Zytel based polymer. Additional components include an injection molded magazine follower and a spring formed from heat treated chrome silicon wire. Does not fit rifles using the Armalite pattern magazines.