ProMag SMIA18 15rd Magazine (.40 S&W) for S&W SD

The ProMag SMIA18 is a 15-round replacement magazine designed for S&W SD pistols chambered in .40 S&W. Constructed from heat-treated steel, it features an injection-molded magazine follower and a mag spring formed from chrome-silicone wire. The magazine is made in the USA and serves as a spare or replacement for compatible S&W SD models. Note: this magazine will not work with VE variants.

Key Specifications

• Caliber: .40 S&W.
• Capacity: 15 rounds.
• Material: Steel.
• Model: SMIA18 / Standard.
• Model fit: SD (S&W SD model family).
• Product type: Detachable magazine.
• Follower: Injection-molded follower.
• Spring: Chrome-silicone wire spring.
• Country of origin: Made in the USA.
• Weight (as listed): .25 (unit not specified in source data).

This ProMag SMIA18 magazine provides a factory-compatible option for S&W SD owners who need a spare or replacement. Its heat-treated steel construction and dedicated follower and spring design support reliable feeding and durability in routine use. Specify this magazine when you require a straightforward, serviceable spare compatible with S&W SD pistols in .40 S&W.