ProMag Sig Pro SIG-A12 .40 S&W 12-Round Blue Steel Magazine, Black Oxide Finish

The ProMag SIG-A12 is a 12-round aftermarket pistol magazine built for Sig Sauer SIG Pro-series handguns chambered in .40 S&W. The magazine body is constructed from heat-treated steel with a black oxide finish, and it uses an injection-molded follower with a heat-treated chrome silicon wire spring to promote consistent feeding and dependable function.

• 12-round capacity for Sig Sauer SIG Pro .40 S&W pistols
• Heat-treated steel body with black oxide finish
• Injection-molded follower with heat-treated chrome silicon wire spring

Made in the USA, the SIG-A12 offers a durable replacement or spare magazine option for SIG Pro .40 S&W owners, balancing robust steel construction with reliable internal components for everyday range use and training.