The ProMag SMI28 is a 10-round extended replacement magazine designed for the Smith & Wesson M&P Shield chambered in 9mm. It features a heat-treated blued-steel magazine body with an injection-molded follower and a precision-formed spring for reliable feeding. Manufactured in the USA, these magazines come with a lifetime warranty against manufacturer defects.
Key Specifications
- Holds 10 rounds for the S&W M&P Shield.
- Chambered for 9mm Luger (9×19).
- Designed to fit M&P Shield pistols (does not fit Shield EZ variant).
- Magazine body material: Steel.
- Finish: Blued for corrosion resistance and traditional appearance.
- Product type: Extended magazine.
- Dimensions listed as 1.55 X 3.00 X 9.20 (manufacturer-provided).
- Weight listed as 0.23 (manufacturer-provided).
- Made in the USA (Phoenix, Arizona).
- Backed by a lifetime warranty against manufacturer defects.
Built to serve as a reliable spare or replacement for Shield owners, this ProMag magazine combines durable steel construction with a molded follower and an anti-fatigue spring to maintain readiness over long-term use. Its extended 10-round capacity and blued finish provide a low-profile, serviceable option for range use and everyday carry pistols where compatible, delivering straightforward performance and long-term support from a U.S.-based manufacturer.
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