PROMAG MAG MP5/PTR9 9MM 50RD DRUM BLK

50-round drum magazine – Fits MP5 / PTR9 9mm pistol – Drum housing constructed of a proprietary DuPont® Zytel™ based polymer – Magazine upper tower has an over molded heat treated carbon steel feed lip reinforcement – Injection molded magazine follower – Magazine spring formed from heat treated stainless steel – Made in USA