ProMag SIGA13 15-Round Magazine 40 S&W Sig Pro Blued Steel

The ProMag SIGA13 delivers reliable feeding and extended capacity for Sig Pro pistols chambered in 40 S&W. This aftermarket magazine extends shooting sessions while maintaining the proven steel construction that competitive shooters and law enforcement professionals demand.

What Makes This Different

Unlike factory magazines limited to standard capacity, the SIGA13 provides 15 rounds of 40 S&W ammunition in a single magazine. The blued steel body resists corrosion better than polymer alternatives while providing the rigid structure needed for consistent cartridge presentation. Heat-treated steel construction withstands repeated loading cycles and drop impacts that can compromise lesser materials.

Key Features

• 15-round capacity extends shooting time between reloads
• Blued steel construction provides superior durability and corrosion resistance
• Precision-engineered follower ensures smooth cartridge feeding
• Heat-treated steel spring maintains consistent tension through thousands of cycles
• Drop-free design enables rapid magazine changes under stress
• Witness holes allow quick round count verification
• Compatible with all Sig Pro pistol models in 40 S&W

Range testing shows reliable function through extended shooting sessions without feeding interruptions. The steel construction handles the higher pressures of 40 S&W cartridges while the precision-machined interior dimensions accommodate various bullet profiles from hollow points to full metal jacket rounds. Competition shooters benefit from the extended capacity during USPSA and IDPA matches, while the robust construction suits duty carry applications.

Technical Specs

• Capacity: 15 rounds
• Caliber: 40 S&W
• Material: Blued carbon steel body
• Compatibility: Sig Pro pistol series
• Spring: Heat-treated steel
• Follower: High-impact polymer
• Base plate: Steel with polymer insert
• Finish: Traditional blued steel

ProMag's manufacturing standards ensure dimensional consistency across production runs, providing reliable interchange ability with factory magazines. The SIGA13 represents proven aftermarket engineering for shooters requiring extended capacity without sacrificing the mechanical reliability that steel construction provides.