Sig Sauer P320/P250 18-Round Magazine 40 S&W 357 SIG Blued Steel

The Sig Sauer MAGMODF4318 delivers reliable feeding and extended capacity for P320 and P250 pistols chambered in 40 S&W and 357 SIG. This factory magazine maintains the same dimensional standards and quality control as the magazines shipped with new firearms. The blued steel construction provides corrosion resistance while maintaining the precise tolerances required for consistent chambering.

What Makes This Different

Factory Sig Sauer magazines undergo the same rigorous testing and quality control as the firearms themselves. The steel body construction offers superior durability compared to polymer alternatives, particularly under high round counts and demanding conditions. The 18-round capacity provides a significant advantage over standard capacity magazines, extending shooting sessions and reducing reload frequency during competition or training.

Key Features

• 18-round capacity for extended shooting sessions
• Dual caliber compatibility: 40 S&W and 357 SIG cartridges
• Blued steel construction for enhanced durability and corrosion resistance
• Factory Sig Sauer specifications ensure perfect fit and function
• Compatible with both P320 and P250 pistol platforms
• High-visibility follower for easy round count assessment
• Heat-treated steel magazine lips prevent deformation under stress

The magazine functions reliably across temperature extremes and maintains consistent feeding pressure throughout the entire capacity range. Competition shooters benefit from the extended capacity during USPSA and IDPA matches, while law enforcement appreciates the additional rounds available during qualification and duty use. The steel construction withstands repeated loading cycles without spring fatigue or dimensional changes that can affect reliability.

Technical Specs

• Capacity: 18 rounds
• Caliber: 40 S&W, 357 SIG
• Material: Blued carbon steel body
• Compatibility: Sig Sauer P320 and P250 pistols
• Manufacturer: Sig Sauer
• Model Number: MAGMODF4318
• UPC: 798681561018
• Country of Origin: USA

This factory magazine ensures optimal performance from Sig Sauer pistols without compromising reliability or accuracy. The proven design has been tested through millions of rounds in both civilian and military applications, making it the logical choice for serious shooters who demand consistent performance.