The Rock Island Armory STK100 Ultra presents a robust, duty-oriented 9mm semi-automatic pistol engineered for consistent performance. Integrating an aluminum frame with a 4.5-inch barrel, this platform prioritizes durability and recoil management, establishing it as a reliable option for both service and practical applications.
Key Features
Precision Aluminum Frame
The STK100 Ultra utilizes a precision-machined aluminum frame, differentiating it from common polymer-framed alternatives. This construction provides enhanced rigidity and structural integrity, contributing to improved felt recoil mitigation and shot-to-shot consistency. The material selection ensures long-term operational durability under demanding conditions.
Optimized Ergonomics
Engineered for intuitive handling, the pistol features an optimized grip angle designed to promote natural point-of-aim. The texture and contours facilitate secure purchase, enhancing control during rapid firing sequences and mitigating shift.
Optics-Ready Slide
The slide is precisely milled to accept a broad range of popular red dot sights, enabling direct integration of modern aiming solutions. This provision allows operators to optimize target acquisition speed and engagement distances, adapting the platform to specific operational requirements.
High-Capacity Magazine System
With a standard capacity of 17+1 rounds of 9mm ammunition, the STK100 Ultra offers substantial firepower. The design is compatible with widely available magazines, ensuring operational flexibility and straightforward resupply.
Technical Specifications
General
- Caliber: 9mm Luger
- Capacity: 17+1 Rounds
- Barrel Length: 4.5 inches
- Frame Material: Aluminum
- Slide Finish: Black
- Action: Striker-Fired, Semi-Automatic
- Sights: Standard Iron Sights with Optics Cut
- SKU: LIP|RI57113









