ProMag SMIA11 15rd Magazine for S&W M&P .40 S&W

The ProMag SMIA11 is a replacement double-stack magazine designed for Smith & Wesson M&P series pistols in .40 S&W. It holds 15 rounds and uses a heat-treated blued-steel body combined with a polymer follower and a chrome-silicon spring. Constructed and assembled in the U.S.A., the magazine is intended as a spare or replacement detachable magazine for centerfire pistol applications. The design focuses on reliable feeding and straightforward serviceability.

Key Specifications

• Holds 15 rounds.
• Caliber: .40 S&W.
• Constructed from heat-treated blued steel.
• Uses an injection-molded follower made from Zytel-based polymer.
• Spring wound from chrome-silicon wire.
• Magazine type: double-stack detachable.
• Fit: Smith & Wesson M&P 40.
• Application: centerfire pistol.
• Finish: blued.
• Manufactured in the U.S.A..

For owners of S&W M&P pistols in .40 S&W who prefer proven materials and simple, serviceable design, the SMIA11 provides a practical spare magazine option. Its combination of blued-steel construction, polymer follower, and chrome-silicon spring supports consistent feeding and dependable service life for range use, training, or everyday equipment rotation. The straightforward design makes it an effective addition to a no-nonsense, performance-focused kit.