ProMag SIGA24 9mm 40rd Black DuPont Zytel Polymer Magazine - Fits Sig Sauer MPX

The ProMag SIGA24 is an extended aftermarket magazine purpose-built for the Sig Sauer MPX platform chambered in 9mm. With a generous 40-round capacity, this magazine dramatically extends shooting sessions between reloads and is engineered to feed reliably in MPX pistol-caliber carbines.

The magazine body is molded from a proprietary DuPont Zytel-based polymer, giving it a lightweight yet durable construction that shrugs off impact and resists corrosion in tough range and field conditions. An injection-molded polymer follower keeps rounds seated and aligned for smooth, consistent presentation during high-round-count fire. The black finish matches factory MPX magazines for a clean, factory-look profile on the gun.

ProMag is a long-established American manufacturer of aftermarket firearm accessories and magazines, well-known for offering extended-capacity and hard-to-find configurations as cost-effective alternatives to factory originals. The SIGA24 is designed specifically for the Sig Sauer MPX 9mm rifle and is proudly made in the USA.