ProMag SMI12 8rd .45 ACP Magazine for S&W 645/4506/4566/4586

A single-stack 8-round magazine from ProMag designed for Smith & Wesson 645, 4506, 4566 and 4586 series pistols chambered in .45 ACP. The SMI12 pairs a heat-treated blued-steel body with polymer components for reliable feeding and durable service life. It serves as a direct-replacement or spare magazine suitable for range use and service pistol applications.

Key Specifications

• Holds 8 rounds of .45 ACP.
• Compatible with Smith & Wesson 645, 4506, 4566 and 4586 series pistols.
• Constructed from heat-treated blued-steel for structural durability.
• The follower, lock-plate, and base-plate are molded from a DuPont Zytel-based black polymer.
• The spring is wound from Chrome-silicon wire and heat-treated for strength and reliability.
• Finished in blue (blued steel appearance).
• Listed weight: 0.2.
• Construction: steel body with polymer components as noted above.

This ProMag SMI12 magazine is a straightforward, dependable option for owners of compatible Smith & Wesson pistols who need a factory-style replacement or spare. Its simple, proven construction emphasizes reliable feeding and longevity in regular use, making it suitable for range rotation and service-oriented carry setups where a compact single-stack magazine is preferred.