ProMag SMI31 9rd Magazine for S&W M&P Shield .40 S&W

The ProMag SMI31 is a 9-round detachable magazine manufactured for the Smith & Wesson M&P Shield in .40 S&W. It features a heat-treated blued-steel body with an injection-molded follower and a chrome-silicon spring. Made in the USA, the magazine provides a factory-compatible spare or replacement for Shield pistols chambered in .40 S&W.

Key Specifications

• The magazine capacity is 9 rounds.
• Designed for use with the S&W M&P Shield pistol.
• Chambering is .40 S&W.
• Body construction uses steel.
• The external finish is blued.
• The magazine spring is formed from chrome silicone wire.
• This magazine uses an injection-molded magazine follower.
• The product type is detachable.
• Overall dimensions are listed as 1.20 X 6.10 X 2.35.
• Manufactured in the USA.

Built to match the form and function of the Shield platform, the ProMag SMI31 delivers straightforward service and standard capacity in a durable blued-steel package. Its heat-treated components and chrome-silicon spring are specified to support consistent feeding and long-term service when used in compatible pistols. Note: this item is not available for direct shipment to California.