- 30-round drum Magazine
- Fits Sig Sauer Sig MPX 9mm
- Heat treated stamped steel upper magazine housing with black oxide finish
- Magazine body constructed of a proprietary DuPont Zytel based polymer
- Injection molded magazine follower
- Heat treated stainless steel wire
- 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. This ProMag Sig Sauer MPX Drum Magazine is constructed out of DuPont Zytel based polyer and a heat treated stamped steel upper magazine housing with black oxide finish.