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
- 40-round Magazine
- Fits Sig Sauer® Sig MPX 9mm rifle
- Magazine body constructed of a proprietary DuPont™ Zytel® based polymer
- Injection molded magazine follower
- Magazine spring formed from heat treated chrome silicon wire
- Made in USA
