The ProMag SMI-A28 is a reliable, high-capacity 13-round replacement magazine engineered specifically for the Smith & Wesson M&P Shield Plus 9mm pistol. Built for long-lasting durability and consistent performance, the magazine body is constructed from heat-treated steel and finished with a corrosion-resistant blue steel coating. It features an injection-molded polymer follower and an anti-fatigue spring formed from precision-wound chrome silicon wire to ensure exceptionally smooth ammunition feeding. Designed for an exact fit, this magazine is a perfect option for range training, tactical backup, or expanding your daily carry capacity. Every magazine is proudly made in the USA.

• 13-Round Extended Magazine.
• Fits Smith & Wesson Shield Plus 9MM Pistol.
• Heat Treated Steel with Black Oxide Finish.
• Injection Molded Magazine Follower.
• Magazine Spring Formed from Heat Treated Chrome Silicone Wire.