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.