Item #:
708279016318
UPC: #:
708279016318
availability:
in stock

ProMag SMIA24 20-Round Magazine 9mm S&W CSX Steel Construction

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The ProMag SMIA24 extends the S&W CSX's capacity to 20 rounds of 9mm ammunition, providing nearly double the standard magazine capacity. This extended magazine features 4140 heat-treated steel construction with a blued finish for enhanced durability and corrosion resistance.

What Makes This Different

Unlike polymer alternatives, the SMIA24 utilizes 4140 heat-treated steel throughout its construction, offering superior strength and dimensional stability under repeated loading cycles. The steel body maintains consistent spring tension and feed geometry even after thousands of loading cycles. This construction method provides enhanced reliability compared to standard polymer magazines, particularly in high-stress environments where magazine failure is not an option.

Key Features

  • 20-round capacity increases firepower over standard S&W CSX magazines
  • 4140 heat-treated steel construction for maximum durability and longevity
  • Blued finish provides corrosion resistance and professional appearance
  • Spring-loaded follower ensures consistent ammunition feeding
  • Precision-engineered feed lips maintain proper cartridge presentation
  • Compatible exclusively with S&W CSX pistol platform
  • Removable floorplate for easy cleaning and maintenance
The extended capacity proves valuable in competitive shooting disciplines where reload frequency directly impacts stage times. Law enforcement and security professionals benefit from the increased ammunition capacity during extended engagements. The steel construction maintains reliable function in temperature extremes and high-dust environments where polymer magazines may experience feeding issues.

Technical Specs

  • Capacity: 20 rounds of 9mm ammunition
  • Material: 4140 heat-treated steel body
  • Finish: Traditional blued steel
  • Compatibility: S&W CSX pistols only
  • Spring: High-tensile steel magazine spring
  • Follower: Anti-tilt design for consistent feeding
  • Manufacturer: ProMag Industries
  • UPC: 708279016318
The SMIA24 represents a significant capacity upgrade for S&W CSX owners who require maximum ammunition availability. The heat-treated steel construction ensures long-term reliability that exceeds polymer magazine performance standards.