ProMag Sig Sauer P226 Magazine 40 S&W / .357 Sig Blued Steel 20/rd

The ProMag Sig Sauer P226 Magazine 40 S&W / .357 Sig Blued Steel 20-round is a purpose-built extended magazine designed for law enforcement and tactical operators who require additional on-board ammunition capacity. This 20-round magazine transforms the P226 platform into a higher-capacity option without sacrificing the ergonomics and reliability that professional shooters depend on in duty and training environments.

Construction centers on heat-treated blued steel for corrosion resistance and durability across extended storage and field conditions. The follower lock-plate and base-plate are molded from proprietary DuPont Zytel-based polymer, engineered to withstand repeated loading cycles and impacts common in duty carry and range use. The chrome-silicon wire spring is heat-treated for consistent feeding pressure across the full 20-round capacity, eliminating the performance degradation that can occur with lesser spring materials as rounds are depleted. Precise manufacturing tolerances ensure reliable chambering with both .40 S&W and .357 Sig loads.

This extended capacity magazine is suited for shooters who prioritize maximum ammunition availability during extended training sessions, duty rotations, or competitive shooting. The P226 platform has been adopted across multiple law enforcement agencies and military units worldwide, making compatible magazines a critical component of a professional duty system. For operators seeking to extend baseline ammunition reserves without changing platforms, this ProMag offering delivers proven reliability in a standard OEM-profile design.

Magazine capacity and construction quality directly impact mission readiness. The 20-round configuration preserves shooter familiarity with existing P226 ergonomics while meaningfully increasing round count—a practical advantage in any scenario requiring sustained fire or multiple engagement sequences.