ProMag magazines are designed utilizing both traditional stamping and welding of heat-treated high carbon steel, and modern precision injection molding of mil-spec polymer compounds. Every ProMag magazine is backed by a lifetime guarantee against manufacturer's defects. This ProMag Sig Sauer P320 Drum Magazine is constructed out of DuPont Zytel based polyer and the upper tower has full length steel internal insert stamped and welded like the factory magazine.

Specifications and Features:
Manufactured from Durable Polymer
Caliber: 9mm Luger
Capacity: 50 Rounds
Full Length Steel Internal Insert
Injection Molded Follower
Stainless Steel Spring
Made in the USA
Black