ProMag Sig Sauer MPX 9mm 40-Round Magazine
High-capacity 40-round magazine for Sig Sauer MPX 9mm rifles. Durable DuPont Zytel polymer construction with heat-treated chrome silicon spring. Made in USA.
Fits: Sig Sauer MPX
ProMag Sig Sauer MPX 9mm 40-Round Magazine
This magazine is purpose-built for the Sig Sauer MPX 9mm rifle platform, offering serious shooters the capacity they need for extended range sessions, competition, or tactical training.
Key Features
- 40-round capacity for extended shooting without frequent reloads
- Durable polymer construction using proprietary DuPont Zytel material for reliable performance and longevity
- Heat-treated chrome silicon spring ensures consistent feeding and reliable operation across thousands of rounds
- Injection-molded follower for smooth, reliable ammunition feeding
- Made in USA by a manufacturer with decades of magazine production experience
Design & Performance
The magazine body is engineered from a proprietary DuPont Zytel-based polymer that resists impact, UV degradation, and environmental stress. The heat-treated spring maintains its tension and reliability even after extended use, while the injection-molded follower ensures smooth, consistent ammunition feeding.
Whether you're running drills at the range, competing in matches, or training for duty use, this magazine delivers the reliability and capacity serious shooters demand.
