PROMAG DRUM AR-15 9MM GLK BLK 30RD BLK POLYMER

30-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 USA