ProMag Industries, Magazine, 9MM, 50 Round Drum, Fits Sig Sauer P320, Polymer, Black
- 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
- Made in USA
