ProMag S&W M&P .40 S&W 10rd Blued Steel Mag

This ProMag magazine is a restricted-capacity, double-stack replacement designed for Smith & Wesson M&P pistols chambered in .40 S&W. It is built with a heat-treated steel magazine body, an injection-molded polymer follower and base-plate, and a spring formed from chrome-silicon wire that is heat-treated for strength. The design is intended to provide reliable feeding in a compact 10-round configuration.

Key Specifications

• The magazine holds 10 rounds.
• Compatible with Smith & Wesson M&P series pistols in .40 S&W.
• The magazine body is constructed from heat-treated steel.
• The follower and base-plate are molded from a DuPont Zytel-based black polymer.
• The spring is formed from chrome-silicon wire and heat-treated for durability.
• Configured as a double-stack magazine for increased capacity in a compact form factor.
• Includes a follower lock-plate and molded base-plate for secure assembly.
• Sold as a restricted-capacity 10-round version of the full-capacity SMI-A11 design.
• Manufactured in the United States.

Rugged and straightforward, this ProMag magazine offers a factory-style replacement option for .40 S&W M&P owners who require a 10-round, double-stack unit built with heat-treated components and polymer internals. Its utilitarian construction focuses on consistent feeding and serviceable materials for routine carry, range use, or as a spare magazine in a well-maintained inventory.