- 55-round drum magazine
- Fits FN® Five-seveN® USG 5.7x28mm pistol
- Magazine body constructed of a proprietary DuPont® Zytel™ based polymer
- Blue steel upper magazine tower
- Injection molded magazine follower
- Magazine spring formed from heat treated stainless steel
- Made in USA
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. Made in USA
