ProMag

50-round drum Magazine - Fits most AR-308 / .308 Cal AR type rifles using LR-308 (DPMS) or SR-25 pattern magazines - Over molded stamped steel feed lips and magazine catch - Magazine body constructed of a proprietary DuPont Zytel based polymer - Injection molded magazine follower - Heat treated stainless steel magazine spring - Patented Design - Does not fit rifles using Armalite pattern magazines - Made in USA