ProMag SIG21 10rd 9mm Magazine for Sig P938 Blued Steel

The ProMag SIG21 is a 10-round replacement magazine designed for the Sig Sauer P938 and chambered for 9mm Luger. The body is constructed from heat-treated steel with a blued finish and includes an injection-molded follower and a spring formed from heat-treated chrome-silicone wire. Made in the USA, this magazine provides a factory-style capacity where legal and is intended for use as a spare or replacement. It is suited to range use, everyday carry maintenance, or as a backup magazine.

Key Specifications

• Capacity is 10 rounds.
• Caliber is 9mm Luger.
• Fits Sig Sauer P938.
• Magazine body is constructed of heat-treated steel.
• Finish is Blued.
• Follower is an injection-molded magazine follower.
• Spring is formed from heat-treated chrome-silicone wire.
• Application is centerfire pistol.
• Product type is detachable handgun magazine.
• Manufactured in the USA.

This ProMag SIG21 offers a straightforward, OEM-style spare magazine option for Sig Sauer P938 owners who value uncomplicated, dependable components. Its heat-treated steel construction, blued finish, and precision-wound spring deliver a pragmatic replacement that integrates with factory ergonomics and function, making it suitable for range use, carry routines, or as a spare in a kit.