SKU: ZMSMIA11
UPC: 708279011368
MPN: SMI-A11
The ProMag S&W M&P-40 Double Stack Magazine .40 S&W Blued Steel 15-Round is a purpose-built high-capacity magazine engineered for the Smith & Wesson M&P .40 S&W platform. This double-stack configuration delivers a 15-round capacity in a profile that maintains reliable feeding while keeping overall grip circumference manageable during extended shooting sessions. Built in the U.S.A., this magazine combines proven materials and construction methods trusted by law enforcement and civilian operators running the M&P system.
Construction centers on heat-treated blued-steel body paired with a follower lock-plate and base-plate molded from proprietary DuPont Zytel-based black polymer. The spring assembly uses chrome-silicon wire that is heat-treated for consistent pressure and reliability across extended duty cycles. The blued-steel finish resists corrosion under typical carry conditions, while the polymer components isolate the magazine body from moisture and salt exposure. The lock-plate design prevents follower separation, a critical failure point in high-round-count magazines subjected to repeated loading and unloading.
This magazine serves patrol officers, tactical teams, and sport shooters who demand consistent performance from the M&P-40 platform. It is particularly suited for operators who need extended capacity without sacrificing ergonomics or reliability—common requirements in duty carry, range training, and competitive environments. As a backup magazine or primary duty magazine, the 15-round capacity strikes the balance between firepower and practical reload speed that the .40 S&W platform demands.
The M&P line remains one of the most widely adopted duty platforms in North America, and magazine reliability directly impacts shooter confidence during training and deployment. ProMag S&W M&P-40 magazines are designed to meet the feeding and durability standards expected in professional and competitive use, ensuring that performance remains consistent through thousands of rounds.
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Promag Mfg. Inc.