The ProMag SMI-A29 is a premium, high-capacity 15-round extended replacement magazine engineered specifically for the Smith & Wesson M&P Shield Plus 9mm pistol. Built for rugged durability and consistent operation, the magazine body is constructed from heat-treated steel and finished with a corrosion-resistant black oxide/blue steel coating. It features an injection-molded polymer follower and an anti-fatigue spring formed from precision-wound, heat-treated chrome silicon wire to ensure exceptionally smooth, reliable ammunition feeding. Perfect for extended range sessions, tactical backup, or maxing out your daily carry capacity, this magazine delivers full-size firepower in a micro-compact platform. Every magazine is proudly made in the USA.

• 15-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.