PROMAG DRUM AR15 9MM BLK GLOCK STYLE 50RD POLYMER

50-round drum magazine - Fits 9mm AR-15 carbines using GLOCK type 9mm magazines - Drum housing constructed of a proprietary DuPont Zytel� based polymer - Magazine upper tower has full length steel internal insert stamped and welded like the factory magazine - Injection molded magazine follower - Magazine spring formed from heat treated stainless steel - Flush Fit drum magazine for use in Glock type magazine - Made in U.S.A.