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

This is a replacement magazine compatible with the Smith & Wesson M&P Shield chambered in .40 S&W. It provides a capacity of six rounds and is designed as a detachable magazine for Shield pistols. Manufacturer text describes heat-treated blued-steel construction along with an injection-molded follower and a chrome-silicone spring; the product is noted as made in the USA and carrying a lifetime warranty.

Key Specifications

• The capacity is 6 rounds.
• The chambering is listed as .40 S&W.
• Fits the S&W M&P Shield platform.
• Manufacturer descriptions reference heat-treated blued steel construction and also reference components molded from ProMag TECHNAPOLYMER.
• The follower is described as an injection-molded follower in manufacturer text.
• One manufacturer description lists the spring as chrome-silicone wire, while another references an anti-fatigue spring.
• The finish is listed as Oxide / blued.
• The product type is detachable magazine.
• The listing identifies the origin as Made in the USA.
• The manufacturer references a lifetime warranty.

This magazine provides a straightforward spare or replacement option for owners of the S&W M&P Shield in .40 S&W. Its compact six-round capacity and manufacturer-descript construction details make it suitable as a practical addition to a range kit or for daily carry rotation. Backed by the listed lifetime warranty, it’s presented as a durable, factory-supported magazine option for Shield users.