Item #:
812285026923
UPC: #:
812285026923
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Rock Island STK100 Magazine 17rd 9mm Luger Black Steel

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The Rock Island STK100 17-round magazine delivers reliable feeding and extended capacity for 9mm Luger firearms. This steel-constructed magazine provides shooters with additional rounds between reloads while maintaining the durability expected from Rock Island Armory components.

What Makes This Different

The STK100 magazine features heat-treated steel construction that resists deformation under heavy use, unlike polymer alternatives that can crack under stress. The 17-round capacity extends standard magazine capacity by 2-3 rounds compared to typical factory magazines. Anti-tilt followers and precision-wound springs ensure consistent cartridge presentation to the chamber.

Key Features

  • 17-round capacity for extended shooting sessions
  • Heat-treated black steel body resists corrosion and impact damage
  • Anti-tilt follower prevents feeding malfunctions
  • Precision-wound spring maintains consistent tension
  • Compatible with Rock Island STK100 pistol platform
  • Witness holes for quick round count verification
  • Removable floor plate for maintenance access
This magazine performs consistently across temperature ranges from -20°F to 140°F, making it suitable for competitive shooting, training, and duty applications. The steel construction handles repeated loading cycles without spring fatigue, while the anti-corrosion finish protects against moisture and handling wear. Competition shooters benefit from the extended capacity during stage runs, while training applications see reduced reload frequency.

Technical Specs

  • Capacity: 17 rounds
  • Caliber: 9mm Luger
  • Material: Heat-treated steel body
  • Finish: Black oxide coating
  • Compatibility: Rock Island STK100 pistols
  • Spring: Music wire construction
  • Follower: Anti-tilt polymer design
  • Floor plate: Removable steel construction
The STK100 magazine represents proven reliability engineering at an accessible price point. Steel construction costs more than polymer but delivers superior longevity under demanding use conditions.