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 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.

Features and Specifications:
Caliber: 5.7x28mm
Capacity: 55 Rounds
Manufactured from Durable Polymer
Full Length Steel Internal Insert
Injection Molded Follower
Stainless Steel Spring
Made in the USA
Black

Fits: FN Five-Seven USG 5.7x28mm pistols