ProMag Industries, Magazine, 9MM, 50 Round Drum, Fits Sig Sauer P320, Polymer, Black

ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer's defects. Magazine springs are precision wound using heat-treated chrome silicon wire and each and every step of the assembly process is checked and double checked in order to maintain the same consistent level of quality.

• 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