ProMag SMI29 Magazine for S&W M&P Shield .40 S&W — 6rd

The ProMag SMI29 is a detachable replacement magazine designed for the Smith & Wesson M&P Shield. It accepts .40 S&W cartridges and holds six rounds. The magazine uses heat-treated steel components with an injection-molded follower and a chrome-silicone wire spring to maintain reliable function. It is made in the USA and is covered by ProMag's lifetime warranty.

Key Specifications

• Compatible with the Smith & Wesson M&P Shield.
• Chambered for .40 S&W.
• Holds 6 rounds.
• Constructed from heat-treated blued steel components.
• Features an injection-molded magazine follower.
• Uses a chrome-silicone wire spring designed for longevity.
• Finish is described as blued steel in product text and listed as Oxide in attributes.
• Weight listed as 0.2 (unit not specified in source data).
• Made in the USA and backed by a lifetime warranty.

Compact and straightforward, the SMI29 provides a durable, factory-compatible spare magazine for everyday carry and range use. Its simple construction and manufacturer warranty make it a practical choice for M&P Shield owners seeking an extra magazine that matches original fit and function.