ProMag SMI30 7-Round Magazine — S&W Shield .40 S&W

The ProMag SMI30 is a detachable 7-round replacement magazine designed for the Smith & Wesson M&P Shield chambered in .40 S&W. It uses a heat-treated steel magazine body with a blued/black oxide appearance and an injection-molded follower for consistent alignment of cartridges. The magazine spring is formed from heat-treated chrome silicon wire to maintain reliable feed tension. These magazines are produced in the United States and are supported by ProMag’s stated lifetime warranty.

Key Specifications

• The magazine capacity is 7 rounds.
• The caliber is .40 S&W.
• Intended fit is Smith & Wesson M&P Shield.
• The magazine body is constructed of heat-treated steel.
• The finish is black oxide.
• The follower is injection molded.
• The spring is made from heat-treated chrome silicon wire.
• The product type is detachable.
• The model designation is SMI30.
• Manufactured in the USA.

Built for straightforward service life and reliable feeding, the ProMag SMI30 provides a factory-style 7-round profile for Shield owners seeking a durable spare or replacement magazine. Its steel construction and proven spring materials deliver dependable operation while maintaining a slim form factor suitable for everyday carry and compact carry rigs.