Upgrade your concealed carry kit with the Sig Sauer® P250™ / P320™ Compact .40 S&W / .357 Sig 13-Round Magazine. This factory magazine is constructed from durable stainless steel with an impact-resistant polymer baseplate and an anti-friction coating for superior strength and lasting corrosion resistance for reliable field performance in virtually any environment. The heat-treated steel wire spring and polymer follower ensure reliable feeding and proper cartridge alignment in high-stress target and defensive environments. Sig Sauer's P320 (based on the Sig P250 frame) is now the standard sidearm of America’s fighting men. It’s designed for hard use in the toughest conditions and its factory magazines keep up flawlessly. Order today!